Here they are, the perfect idler pulleys for Hovercraft. It's lightweight, it's strong, and it can withstand the elements (including salt-water).

This pulley is similiar to our standard V-belt idler pulley except it has a flat top so it can be used on the back side of your belts.

These composite pulleys are molded from premium quality high-strength glass reinforced nylon. They have precision, sealed bearings which are greased for life and never need relubrication. That means these pulleys will never rust and fail like their steel counterparts.

The composite surface leaves an ultra smooth groove for quiet operation and extended belt life versus steel or cast iron pulleys.

Specs:
5 3/4" diameter
17mm bore (works on standard UH-style 5/8" threaded rod setups)
14 1/2 ounces
Use on any flat-back belt section