Time-tested passive pro for everything from granite walls to quartzite cragging-Stoppers are the descendants of the original chocks that started the clean climbing revolution.Time-tested passive pro, Stoppers are a direct link to the original chocks that started the clean climbing revolution. Black Diamond Stoppers are an essential for every trad rack, designed with a transverse taper that permits sideways placements in flares and shallow seams. Anodized by size, they're quickly identifiable and rounded edges make for easy removal. Each Stopper is equipped with a durable, galvanized steel cable.Features: Durable aluminum heads and steel cables Transverse taper is versatile in flares, constrictions and parallel cracks Rounded edges for easy cleaning (smaller sizes are straight for better surface contact) *Sizes 1 and 2 are for direct aid only Weight : [size 1] 7 g (0.25 oz) [size 2] 8 g (0.28 oz) [size 3] 15 g (0.53 oz) [size 4] 16 g (0.56 oz) [size 5] 18 g (0.63 oz) [size 6] 32 g (1.1 oz) [size 7] 34 g (1.2 oz) [size 8] 37 g (1.3 oz) [size 9] 39 g (1.4 oz) [size 10] 43 g (1.5 oz) [size 11] 51 g (1.8 oz) [size 12] 58 g (2 oz) [size 13] 71 g (2.5 oz) Strength: [size 1-2] 2 kN (450 lbf) [size 3] 5 kN (1124 lbf) [size 4-5] 6 kN (1349 lbf) [size 6-12] 10 kN (2248 lbf) Dimensions: [size 1] 4.3/9.1 mm (0.17/0.36 in) [size 2] 4.8/9.9 mm (0.19/0.39 in) [size 3] 6.1/11.4 mm (0.24/0.45 in) [size 4] 6.9/12.4 mm (0.27/0.49 in) [size 5] 8.4/13.5 mm (0.33/0.53 in) [size 6] 10.2/15.5 mm (0.40/0.61 in) [size 7] 11.7/16.3 mm (0.46/0.64 in) [size 8] 13.5/18.3 mm (0.53/0.72 in) [size 9] 15.2/20.8 mm (0.60/0.82 in) [size 10] 17.3/23.4 mm (0.68/0.92 in) [size 11] 20.1/26.7 mm (0.79/1.05 in) [size 12] 22.9/30.5 mm (0.90/1.20 in) [size 13] 26.4/35.1 mm (1.04/1.38 in) Shipping DisclaimerPlease Note: Weight-bearing, technical climbing equipment is not eligible for returns. For more information, visit our return policy page