O-Ring and Pulley Wheels

Unknown Technic

The manufacturer has approved the data, but no images.

Manufacturer page

Source: Rebrickable. Data from Rebrickable (rebrickable.com)

Parts list (50 pieces, without spare parts)

How many times will you build it? Include spare parts

Select		Description	Color	Count
		Technic Wedge Belt Wheel Tire 2815	Black	25
		Technic Wedge Belt Wheel [aka Pulley] 4185	Light Gray	25

Part images: LDraw library (ldraw.org), license CC BY 4.0. Part data: Rebrickable.