5 1/2″ Aluminum I Beam 105″ 3″ X 3″ Aluminum Straight Crossbar Extended Step has been added to your order form. Checkout View Order Form $23.95 Sold By The Foot. 5 1/2" Aluminum I Beam quantity Add To Order Form SKU: 216 Category: Crossmembers **Price Is Per Foot** Related products 3″ X 3″ Straight Crossmember Aluminum 80″ $130.95 Part #:4425 Any Crossmember Over 80" Long. Add To Order Form 4 1/2″ Aluminum I Beam $19.95 Part #:215 Sold By The Foot. Add To Order Form 12″ Poly Keel Pad $15.95 Part #:1193 Fits 3" Wide Crossmembers. Add To Order Form 8″ Aluminum I Beam $49.95 Part #:219 Sold By The Foot. Add To Order Form