4'' Light Proof Black Ducting
DL 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""