910-331/p fan motor features a 100% sealed roller bearing design, 130 CFM of air flow, is superbly balanced and runs quiet. When turned on the first setting will be LOW. These blower kits used the 910-331/P blower: 530-518/P, 320-517/P, 490-917, 432-917, 478-915, 946-517/P, 560-517/P, 730-517/P.