This greenhouse replacement cylinder fits the Baylis MK7 Standard Solar Power Roof Vent Opener.  This Baylis greenhouse vent opener will automatically open and close depending on the temperature inside the greenhouse.

 

This is sold as a package of 2 units. 

 

Please note:  Shipping charges will apply when ordered separately.  If you woudl like to know the shipping charges in advance, please call toll free 1-800-665-2124.