SPROCKET Double 22T and 32T 1.00"ID x 1.62" wide at hub. 22T is 4.75" OD and 32T is 6.75" OD. The BRONZE BUSHING used in this sprocket is Qnt. 2 - 71157144. L SERIES (PRIOR S/N 13000) COMBINE; L2 / L3 (EFF S/N 13001-28000) COMBINE; M HILLSIDE COMBINE (PRIOR S/N 15401); M SERIES COMBINE; M2 / M3 SERIES COMBINE (EFF S/N 15401-25900); MH2 HILLSIDE COMBINE;