Alton | Bayliss XL Roof Vent Opener Piston Replacement arrow shed all-size accessories Its ease of use is

Its ease of use is a standout feature: load your product

The VI 34 is perfect for use as a full featured greenhouse

State of the art design will enhance the appearance of any outdoor scene

As the greenhouse warms up

included with the 187 gallon unit

Alton | Bayliss XL Roof Vent Opener Piston Replacement arrow shed all-size accessories Its ease of use isThe Bayliss XL Piston or Power Tube is a direct replacement component designed specifically for the Bayliss XL Automatic Greenhouse Vent Opener. If your current unit is no longer responding as it should, replacing the power tube is a simple and cost effective way to restore smooth, temperature driven vent operation. This tube contains a heat sensitive wax core that expands as temperatures rise and contracts as they fall, driving the piston that opens