3″ X 3″ Straight Crossmember Aluminum 52″ McClain Frame To Crossbar Support has been added to your order form. Checkout View Order Form $89.95 Any Crossmember Under 58″ Long. 3" X 3" Straight Crossmember Aluminum 52" quantity Add To Order Form SKU: 4426 Category: Crossmembers Related products 6 1/2″ Aluminum I Beam $26.95 Part #:217 Sold By The Foot. Add To Order Form 3″ X 3″ Straight Crossmember Aluminum 82″ $133.95 Part #:4815 Any Crossmember Over 82" Long. Add To Order Form 4 1/2″ Aluminum I Beam $19.95 Part #:215 Sold By The Foot. Add To Order Form 3″ X 3″ Straight Crossmember Aluminum 76″ $125.95 Part #:4427 Any Crossmember Over 76" Long. Add To Order Form