8'' Light Proof Black Ducting NatureVAC Vacuum Seal When the desired amount of

When the desired amount of air has been removed from bag

(1) Aerating Water Pump

PH-80: pH HydroTester Series

Electrode: Replaceable glass sensor and reference tube electrodes

8'' Light Proof Black Ducting NatureVAC Vacuum Seal When the desired amount ofDL Light Proof Ducting is strong, durable, and as the description indicates light proof. That means that when properly installed no light will penetrate the ducting and disrupt your plants' lights out schedule. The ducting is also durable with multiple layers of inner liners to protect from punctures from sharp objects. DL Light Proof Ducting is available in 4", 6", 8", 10""