size ：1-1/2" Dail，Back Mount 1/8" NPT mounting Threads. fits Dyna Glo Dura Heat Thermoheat Heaters Fits Heater most Models: KF, KFA, RMC, DF & DFA 45K, 70K, 125K, 175K & 215K Fits Desa, Reddy, Master, Remington, All-Pro, Dyna Glo, Dayton, Knipco, And Most all Kerosene Forced Air fits Pinnacle: Pro Temp, HeatHog, Dayton, WorkHorse, Thermoheat (70-025-0100) fits GHP: Dyna-Glo,Dyna-Pro, Dyna Glo Pro (3740-0049-00,) fits GHP Models Included: RMC-KFA75TL, RMC-KFA125TL, RMC-KFA45DGP-01, RMC-KFA75TDGP-01, RMC-KFA170DGD-01, KFA75H, KFA125H, KFA125DGD, KFA170DGD, RMC-KFA125TDGD-01, RMC-170TDGD-01 fits part # 68-3071 70-025-0100 3740-0049-00 21-1115