HSP
3.90mm center hole diameter. 2.5mm wide. 10.06mm outer diameter.
.12 .18 RC Nitro Engine 2 Shoe Clutch Flywheel Bell Kit
.21 + RC Nitro Engine 2 Shoe Clutch Flywheel + Bell Kit 6mm Axle
.21 + RC Nitro Engine 2 Shoe Clutch Flywheel + Bell Kit 6mm Nut
.21 + RC Nitro Engine 2 Shoe Clutch Flywheel Kit 6mm Axle
.21 + RC Nitro Engine 2 Shoe Clutch Flywheel Kit 6mm Nut