What size are these.? 140 mm 120 mm etc?

They are for 92 mm fans -- like on the NH-9Li, NH-9La, or NH-9x65/

Is there a model for 120mm fans?

The Fan Duct Kit was specifically for the NH-L9 CPU Coolers which are low profile. Haven't seen a 120mm version. The Fan Duct works very well on the NH-L9 coolers, sealing out warm air from inside the case and only allowing the cooler outside air in. I have a tiny AMD build in a 4 liter case, and the Duct kit helps keep CPU Temps in the 95 degrees (39C)

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NA-FD1, Fan Duct Kit for NH-L9i and NH-L9a Series CPU Coolers (Black)

Product ID: 386453296

Details

Brand
Noctua
Cooling method
Air
Power connector type
4-Pin
Product dimensions
12L x 9.9W x

🧩Modular EVA foam spacers 5-45mm

🌡️Up to 5°C cooler CPU temps

🖥️Fits NH-L9i & NH-L9a series

€ 48.31

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Description

❄️ Elevate your SFF cooling game — because every degree counts!

OPTIMIZED AIR INTAKE - Bridges gaps to draw fresh air from outside, avoiding hot internal recirculation.
LIGHTWEIGHT DURABLE - Crafted from premium EVA foam for lasting performance without adding bulk.
SEAMLESS COMPATIBILITY - Designed exclusively for Noctua NH-L9i and NH-L9a series coolers, including chromax.black editions.
PRECISION COOLING UPGRADE - Slash CPU temps by up to 5°C with smart airflow redirection.
TAILORED FIT FOR SFF BUILDS - Adjustable EVA foam spacers from 5 to 45mm in 1mm increments for perfect case compatibility.

The Noctua NA-FD1 Fan Duct Kit is a modular EVA foam spacer system designed to enhance cooling efficiency for NH-L9i and NH-L9a series CPU coolers. By bridging gaps between the cooler and perforated case panels (5-45mm adjustable), it channels fresh external air directly to the cooler, reducing CPU temperatures by up to 5°C. Ideal for small form factor cases, this lightweight, precision-engineered accessory ensures optimal airflow and improved thermal performance.

Specifications

ASIN	B09HKXRQCD
Best Sellers Rank	#30,778 in Computers ( See Top 100 in Computers ) #134 in CPU Fans
Brand Name	Noctua
Compatible Devices	NH-L9i, NH-L9i chromax.black, NH-L9i-17xx, NH-L9i-17xx chromax.black, NH-L9a, NH-L9a-AM4, NH-L9a-AM4 chromax.black
Cooling Method	Air
Customer Reviews	4.6 4.6 out of 5 stars (490)
EU Spare Part Availability Duration	6 Years
Included Components	EVA foam spacers, installation manual, warranty card
Item Dimensions L x W x H	12L x 9.9W x 4.8H centimeters
Item Weight	54 Grams
Manufacturer	NOCTUA
Material Type	EVA foam
Model	NA-FD1
Number of Items	1
Number of Packs	1
Part Number	NA-FD1
Power Connector Type	4-Pin
Unit Count	1 Count

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€ 48.31

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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