RBS carries a complete stock of parts for the BDS blower snouts. This is the snap ring that holds in the driveshaft in the blower snout assm. Made from heat treated steel, measurements are 1.125" shaft x .062" thick.
Good to have in your shop if you rebuild your own blower snouts. Snap rings are sold each and will work with most other manufactures 1.125" blower driveshafts.