This is a brand new exhaust pipe clamp 1 5/8″ inside diameter with 21 finned.
Part number: 70-4947, E4947 Clamp (quantity of 1)
70-0409, E409 Bolt (quantity of 1)
70-8860, E8860 washer spherical (quantity of 1)
Fits: Triumph T90, T100 Twin from 1958-71