Packaging & Delivery Packaging Detail: In bundle,in bulk, to mill's export package standard. Delivery Detail: within 10 days after receipt of prepayment Specifications U-shaped Steel 1.GB standard 2. lowest price 3.Mine Support Steel U-shaped steel Mine Support Steel Specification:25U, 29U, 36U, 40U Standard:GB4697-91 Material:20MnK,Q275 U Steel Specification Model H1 H2 H3 B1 B2 B3 B4 B5 B6 B7 M Section Area cm2 Theoretical Weight kg/m 25U 120 29 15 135 101.5 40 47 39 29 102.3 6.3 31.97 24.95 29U 124 28.5 16 150.5 116 44 53 42 30 116.6 7.2 37 29 36U 138 31.5 17 171 128 50.5 60.5 48.5 35 129.3 7.8 45.69 35.87 40U 141.9 34.7 20.2 171 128.5 50.5 60.5 48.5 35 129.3 8.5 51.02 40.05