Check the listing for details. Genuine GORILLA-LIFT® Extension Roller Assembly Two Pack. Condition: New. Listed at 28.49 USD. Beware of imitations; this is a Genuine GORILLA-LIFT® Extension Roller Assembly Two Pack! • Allows GORILLA-LIFT® to mount further back on side rails while protecting your cables • Gives extra clearance for cables when there are obstructions at the rear edge of side rails • Brackets are secured with hammer in rivets so you don't have to tighten anything underneath your side rails Parts included: • Two Brackets • Two Rollers • Two Clevis Pins • Four Flat Washers • Two Locking Rings • Four Rivets Please note that the shipping address provided MUST HAVE a mail receptacle. Any address provided incorrectly will be charged again for the original shipping amount and we will ship the product a second time to the correct address after contacting you. Thank you.