Rotary 8318. WHEEL BEARING KIT FOR SCAG. USED ON OUR SCAG WHEEL ASSEMBLY 09-3276. CONTAINS ROTARY #5812 OPEN CAGE ROLLER BEARING & #7262 BUSHING. OVERALL ID 1/2" (12.70MM) OVERALL OD 1-3/8" (34.93) OVERALL LENGTH 4-1/16" (103.19 MM)