how long do they last?

With slits in the top a long time. With it OPEN it lasts a couple of months max, from my experience. Try half open, with some foil or plastic over the other half.

I could not stand the smell of pro, literally made me nauseated, is this one less chemically smelling? other suggestions? (room next to horse stall)

i don't find it "odorous" at all

What does this smell like? Is the gel or the block better?

strictly speaking about the smell, I prefer the gel. My block has a sickly sweet smell while the gel is freshness to your face. Block does the job, but not as nice on my nose.

Will this work okay inside of a tractor trailer, with me around it 24/7?

Don’t waste your money on this; it didn’t do what it says it would do. I had it in a smaller space and it didn’t covered up the musty smell. I will not buy again.

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🌬️ Odor control that fits your lifestyle—small block, big impact!

EFFORTLESS SETUP - Just remove the lid and place—no batteries, no plugs, no hassle, just pure odor elimination.
ALL NATURAL SAFETY - Non-toxic formula safe for homes, offices, pets, and plants—breathe easy with zero compromise.
DISCREET POWERFUL - Small 3"x3" block fits seamlessly in vents & tight spaces for odor control without intrusion.
VERSATILE PLACEMENT - Perfect for enclosed spaces, closets, bathrooms, and HVAC vents—wherever odor strikes, Ona Pro blocks it.
LONG LASTING FRESHNESS - 175g solid block designed for extended use, keeping your environment fresh day after day.

The Ona Pro 175g Block is a compact, passive diffusion odor neutralizer measuring 3"x3" (7.62cm x 7.62cm), designed for discreet placement in small enclosed spaces and vents. Safe for use around people, pets, and plants, it requires no power source and offers long-lasting, hassle-free odor control for both home and business environments.

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

€ 38.51

Duties & taxes incl.

Croatiastore

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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Product Dimensions	7.62 x 7.62 x 7.62 cm; 226.8 g
Part number	HGC700327
Item display height	8 centimetres
Item display weight	1.36 kg
Material type	plastic
Power source type	Passive Diffusion
Manufacturer	Hawthorne Hydroponics, LLC
Item model number	ON10075
ASIN	B00518E9O4

Ona Pro - 175g Block

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