Bored to Size Sprockets: 1inch Bore, 5.06 inches OD, 30 Teeth, 40 Chain Size

Bailey Bored to Size Sprockets: 1inches Bore, 5.06inches Outer Diameter, N.30 Teeth, 40inches Chain Size, Hardened Teeth, Black Oxide Finish, 133558

PGN #40 Roller Chain - 10 Feet + 2 Free Connecting Links - Carbon Steel Chains for Bycicles, Mini Bikes, Motorcycles, Go-Karts, Home and Industrial Machinery - 239 Links

Jeremywell #40 Roller Chain Sprocket B Type 1" Bore Hardened 12 Tooth