Receiver Tubes From Buyers Products Are Available In A Variety Of Lengths, Dimensions, And Finishes To Match Your Towing Needs. The 2, 2-1/2, And 3 In. Tubes Have A Cast Steel Collar. All Tubes Feature A Solid Stress Collar Opening. The 2, 2-1/2, And 3 In. Tubes Have A 5/8 In. Hitch Pin Hole While The 1-1/4 In. Tubes Have A 1/2 In. Hitch Pin Hole.