Overview Reviews Product Description Sheave Acetal 73mm OD x 21.2mm W High strength and durability, utilizing the self-lubricating properties of Acetal. Product Videos Custom Field Product Reviews Write a Review Write a Review × Ronstan Sheave Acetal 73mm OD x 21.2mm W Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *