Tube with grid for ONA Block -Tube adapter for ONA Block

The tube with grid for ONA Block lets you eliminate any residual odor at the exit of the air extraction duct of your indoor crop in a safe and natural way. 

It consists of a metal sleeve which is available in different sizes, to match to those of aeration ducts. It comes with a hatch you will place downwards in the grow extraction duct and that will let you access it quickly and easily. Inside, there is a metal grid that can hold up to a couple of Ona Block units without moving. This simple system causes the passing air to trigger a dose of freshener so that when it goes out to the street nothing but a soft fragrance can be smelt. A great way not to attract attention.

Before the invention of this practical ONA accessory, growers had to dismantle ducts in order to set ONA blocks inside or to check their condition, loosening clamps and removing sealing tapes. This is no longer an issue because every time you want to check your ONA block you just need to open the sleeve and replace the block when required.

Measurements of tube with grid for ONA Block

• 125mm
• 150mm
• 200mm
• 250mm
• 315mm