--- product_id: 38397472 title: "ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes)" brand: "captain o-ring" price: "€ 83.80" currency: EUR in_stock: true reviews_count: 8 category: "Captain O Ring" url: https://www.desertcart.hr/products/38397472-orb-boss-hydraulic-fitting-sae-900-o-ring-seal-kit store_origin: HR region: Croatia --- # 12 sorted sizes in durable case -40°F to 250°F temp range 255 precision o-rings ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes) **Brand:** captain o-ring **Price:** € 83.80 **Availability:** ✅ In Stock ## Summary > 🔧 Seal like a boss — never get caught without the perfect o-ring! ## Quick Answers - **What is this?** ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes) by captain o-ring - **How much does it cost?** € 83.80 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/38397472-orb-boss-hydraulic-fitting-sae-900-o-ring-seal-kit) ## Best For - captain o-ring enthusiasts ## Why This Product - Trusted captain o-ring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-in-One Size Range:** Includes all 12 essential BOSS/ORB sizes (-904 to -916) for versatile hydraulic fittings - • **Proudly Made in the USA:** Quality you can trust from Captain O-Ring LLC, backed by warranty and rave reviews - • **Organized for Efficiency:** Robust, compartmentalized case with size chart keeps your workflow seamless and mess-free - • **Wide Temperature Resilience:** Operates flawlessly from freezing -40°F up to scorching 250°F environments - • **Complete Hydraulic Seal Solution:** 255 premium Buna-N 70 durometer o-rings for unmatched oil and fluid resistance ## Overview The Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit features 255 high-quality Buna-N 70 durometer o-rings, covering 12 common BOSS/ORB sizes. Designed for hydraulic fittings, it offers excellent oil and fluid resistance with a wide service temperature range from -40°F to 250°F. Packaged in a durable, compartmentalized case with a size chart, this USA-assembled kit ensures quick identification and reliable sealing performance for professional-grade hydraulic maintenance. ## Description Captain O-Ring - ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes): desertcart.com: Industrial & Scientific Review: Nice set! - Nice set of o-rings in an awesome case. That's usually the problem with these kits, the case is junk and falls apart and your stuff ends up on the ground. Not this kit. Has all the common sizes and feel like quality o-rings. Review: Great assortment - Great set, fit very well and I guess only time will tell how long they last. Large assortment of sizes and all fit my machine so far. Great value for the price. Case is nice to keep them organized and it is not flimsy. ## Features - Includes high quality BN70 (Buna Nitrile 70 durometer) o-rings - the most common o-ring material for hydraulic ORB/BOSS fittings due to it’s excellent sealing ability and resistance to oils and hydraulic fluid. Service temperature of -40F to 250F. - Includes all 12 BOSS/ORB o-ring sizes between -904 to -916. 255 total o-rings. - Used in sealing straight thread tube fittings (ORB / O-Ring Boss Type) in hydraulic equipment - O-Rings are conveniently sorted by size in individual compartments within the divider box with a convenient o-ring size chart included on the kit to quickly and easily size up and identify the o-ring you need. - Manufactured and Warrantied by Captain O-Ring LLC. Proudly assembled in the USA! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BE5J23K | | Best Sellers Rank | #43,098 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #88 in O-Rings | | Brand | Captain O-Ring | | Brand Name | Captain O-Ring | | Customer Reviews | 4.6 out of 5 stars 172 Reviews | | Manufacturer | Captain O-Ring LLC | | Material | Buna-N Rubber | | Material Type | Buna-N Rubber | | Model | BOSS255-BN70 | | Number of Pieces | 255 | | Part Number | BOSSKIT-255pcBN70 | | Set Name | 255 Piece ORB / BOSS Hydraulic BN70 O-Ring Kit | | Temperature Range | 2.5E+2 Degrees Fahrenheit | | UPC | 722589526572 | | Unit Count | 1 Count | ## Product Details - **Brand:** Captain O-Ring - **Manufacturer:** Captain O-Ring LLC - **Material:** Buna-N Rubber - **Temperature Range:** 2.5E+2 Degrees Fahrenheit - **UPC:** 722589526572 ## Images ![ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes) - Image 1](https://m.media-amazon.com/images/I/61McUTf2fgL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice set! *by D***6 on June 6, 2021* Nice set of o-rings in an awesome case. That's usually the problem with these kits, the case is junk and falls apart and your stuff ends up on the ground. Not this kit. Has all the common sizes and feel like quality o-rings. ### ⭐⭐⭐⭐⭐ Great assortment *by T***C on February 3, 2020* Great set, fit very well and I guess only time will tell how long they last. Large assortment of sizes and all fit my machine so far. Great value for the price. Case is nice to keep them organized and it is not flimsy. ### ⭐⭐⭐⭐ recommend *by J***N on December 5, 2025* decent selection ## Frequently Bought Together - Captain O-Ring - ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes) - Captain O-Ring ORS/ORFS (for Flat Face Fittings) Hydraulic O-Ring Seal Kit (Buna 90 / BN90-180 Piece Kit) - Captain O-Ring Flange Seal (SAE Code 61/62) Hydraulic O-Ring Seal Kit (Buna 90 / BN90-55 Piece Kit) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/38397472-orb-boss-hydraulic-fitting-sae-900-o-ring-seal-kit](https://www.desertcart.hr/products/38397472-orb-boss-hydraulic-fitting-sae-900-o-ring-seal-kit) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-25*