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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🌿 Ona Block Pro: The subtle secret to fresh spaces everywhere

EFFORTLESS USE - Just remove lid and place—no setup needed
DISCREET POWERFUL - Small footprint, big odor-fighting impact
VERSATILE PLACEMENT - Perfect for cars, closets, boats & more
LONG LASTING FRESHNESS - Continuous passive diffusion keeps odors at bay
SAFE FOR ALL ENVIRONMENTS - Non-toxic formula works around loved ones

The Ona Block Pro is a compact 6-ounce solid odor neutralizer measuring 3" x 3", designed for small enclosed spaces like cars, closets, and bins. Utilizing passive diffusion, it safely eliminates odors around people, pets, and plants without any active power source, making it an effortless and versatile solution for maintaining fresh environments at home or work.

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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.

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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.

$65

Duties & taxes incl.

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Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

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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 centimeters
Item display weight	3 Pounds
Material type	plastic
Power source type	passive diffusion
Manufacturer	Hawthorne Hydroponics, LLC
Item model number	ON10075
ASIN	B00518E9O4

Ona Block Pro, 6 Ounce

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