Home Products agricultural chain weld on sprockets sprockets w series 40 chain 40 chain Use with W series hubs only. 4 Available Products SALE 4016W - Weld-On Sprocket 16 tooth, for 40 chain. 2.814" O.D., 1.625" I.D. ... SALE 4017W - Weld-On Sprocket 17 tooth, for 40 chain. 2.975" O.D., 1.625" I.D. ... SALE 4018W - Weld-On Sprocket 18 tooth, for 40 chain. 3.136" O.D., 1.625" I.D. ... SALE 4019W - Weld-On Sprocket 19 tooth, for 40 chain. 3.297" O.D., 1.625" I.D. ... 4 Available Products