Shop / Hoist Parts / 4″ I.D. O-Ring for Ammco 18K “Challenger 8-1/2″ Bearing” has been added to your cart. View cart 4″ I.D. O-Ring for Ammco 18K$40.00 In stock 4" I.D. O-Ring for Ammco 18K quantity Add to cart SKU: TH-6-1633 Category: Hoist Parts Related products Emergency Push Botton $27.00 Add to cart 3/8″ Spring $4.03 Add to cart Mohawk Seal Kit Power Unit Column Cylinder $248.33 Add to cart Buttonhead Screw $10.00 Add to cart