GeneralAire® Vapor Pad, For Use With: GeneralAire® Humidifier Model 1137, SL16, 1099LHS, 1040, 1042, 709 and 1137, Trion G100, G300 and Herrmidifier 100, Protech 84-25054-01 and 84-25054-05, Aluminum, 1-1/2 x 14-1/4 x 12 in