Description of Black Diamond Stopper Pro Set #1-13 Essential pro for every trad rack, Black Diamond's Stoppers are 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: Tranverse taper Anodized by size Durable galvanized steel cable #1 Stopper .17/.36" (4.3/9.1 mm); strength 2 kN (450 lbf); weight 7 g (.25 oz) #2 Stopper .19/.39" (4.8/9.9 mm); strength 2 kN (450 lbf); weight 8 g (.28 oz) #3 Stopper .24/.45" (6.1/11.4 mm); strength 5 kN (1124 lbf); weight 15 g (.53 oz) #4 Stopper .27/.49" (6.9/12.4 mm); strength 6 kN (1349 lbf); weight 16 g (.56 oz) #5 Stopper .33/.53" (8.4/13.5 mm); strength 6 kN (1349 lbf); weight 18 g (.63 oz) #6 Stopper .40/.61" (10.2/15.5 mm); strength 10 kN (2248 lbf); weight 32 g (1.1 oz) #7 Stopper .46/.64" (11.7/16.3 mm); strength 10 kN (2248 lbf); weight 34 g (1.2 oz) #8 Stopper .53/.72" (13.5/18.3 mm); strength 10 kN (2248 lbf); weight 37 g (1.3 oz) #9 Stopper .60/.82" (15.2/20.8 mm); strength 10 kN (2248 lbf); weight 39 g (1.4 oz) #10 Stopper .68/.92" (17.3/23.4 mm); strength 10 kN (2248 lbf); weight 43 g (1.5 oz) #11 Stopper .79/1.05" (20.1/26.7 mm); strength 10 kN (2248 lbf); weight 51 g (1.8 oz) #12 Stopper .90/1.20" (22.9/30.5 mm); strength 10 kN (2248 lbf); weight 58 g (2.0 oz) #13 Stopper 1.04/1.38" (26.4/35.1 mm); strength 10 kN (2248 lbf); weight 71 g (2.5 oz)