3″ X 3″ Straight Crossmember Aluminum 80″ 8″ Aluminum I Beam has been added to your order form. Checkout View Order Form $130.95 Any Crossmember Over 80″ Long. 3" X 3" Straight Crossmember Aluminum 80" quantity Add To Order Form SKU: 4425 Category: Crossmembers Related products McClain Frame To Crossbar Support $4.95 Part #:2332 Used With The 4 1/2" And 5 1/2" Tall I Beam. Add To Order Form 10″ Aluminum I Beam $76.95 Part #:4812 Sold By The Foot. Add To Order Form 82″ Aluminum “V” Crossbar $143.95 Part #:1183 Fits Up To A 82" Wide Frame Width. Add To Order Form 58″ Aluminum “V” Crossbar $107.95 Part #:4813 Fits Up To A 58" Wide Frame Width. Add To Order Form