Doyon 97525 Axial Fan-230v 15w 3100 Rpm 106 Cfm 4-11/16" X 1-1/2", 4-1/8" Ctrs Same As #681060 Except Corners Are Tapped With, 10-24 Threads, Cord Only Use # 38-1356, Blodgett Mt1828 Mt2136e Mt2136g Mt3255 Mt3855g Mt3870, Ps536 Ps555, Nu-vu