Growers have been asking for years for a larger mat for their benches and germination chambers. We are now happy to offer these new wider heat mats made from the same quality material as our standard 11" Agritape heat mats. Each mat comes with a ground screen and should be used with our Medium or High Capacity Controllers with ground wires (items 40008-00-00 and 40009-00-00). Size: 22" x 4'. Mats draw 40 watts per foot on the 22" wide mats. Controllers sold separately.