3″ X 3″ Straight Crossmember Aluminum 76″ McClain Frame To Crossbar Support has been added to your order form. Checkout View Order Form $125.95 Any Crossmember Over 76″ Long. 3" X 3" Straight Crossmember Aluminum 76" quantity Add To Order Form SKU: 4427 Category: Crossmembers Related products 5 1/2″ Aluminum I Beam $23.95 Part #:216 Sold By The Foot. Add To Order Form 3″ X 3″ Straight Crossmember Aluminum 58″ $97.95 Part #:4223 Any Crossmember Over 58" Long. Add To Order Form 76″ Aluminum “V” Crossbar $135.95 Part #:4500 Fits Up To A 76" Wide Frame Width. Add To Order Form 8″ Aluminum I Beam $49.95 Part #:219 Sold By The Foot. Add To Order Form