1. The check valves are for common aquarium air pumps. Please DO NOT use them with CO2 system. Great one way check valve for aquarium and fish tank.
2. Protect you air pump by preventing aquarium water from back siphoning during a power outage.
3. Made of durable clear plastic. Net weight: 0.14 oz / 4 g. Please use a paperclip to poke it from Input side to Output side when the outlet inside gets stuck.
4. Air Hole Diameter: 0.15" / 4mm; Overall Size: 2.1" x 0.58" / 5.3 x 1.5 cm (L*Max.D)

Remarks: 

1.  Product delivery duration may vary due to product availability in stock. (Standard Delivery Time 3-5 days).

2. Delivery charge will be at actual for heavy weight and large machinery items that will require individual transport. 

3. Rapidly price changing machinery products price can changes anytime without prior notice/update in the site.  

4. The actual color of the physical product may slightly vary due to the deviation of lighting sources, photography or your device display settings.

Any more information please contact us Phone: 01776 478 254 Email: care@nawabpur.xyz