Auto Verdi make their own anodized aluminum 8mm HTD style pump pulleys and crank gears/pulleys.
A 5mm version is available on special order only.
The pump pulley has the drive hub inbuilt and clamps onto the drive shaft so no keys are needed.This makes it very easy to line up the pulley with the crank pulley.
All pump pulley drive hubs are made to fit the Auto Verdi 15mm drive shaft.
The pulleys are available in 28, 30,32, 33, 34, 36, 38, 39, 40, 42, 45 and 48 tooth.
Crank pulleys are made of the same high-grade aluminum and are anodized including belt guards.
The center hole is 1" with a 1/8" key slot and sizes available are 17,18,19,20 and 21, 22, 24 tooth.