A flexible, single stem unit with an ultra-narrow head width for hard aid or free climbing. SIZE 00 (gray): dimensions 0.34 - 0.47", Strength - 5kN, Weight - 2.2 oz; SIZE 0 (purple): 0.39 - 0.59", 5kN, 2.3 oz; SIZE 1 (blue): 0.49 / 0.71", 8 kN, weight 2.4 oz; SIZE 2 (yellow): 0.62 / 0.89", 10 kN, 2.5 oz; SIZE 3 (orange): 0.74 / 1.04", 10 kN, 2.9 oz; SIZE 4 (red): 0.93 / 1.32", 10 kN, 3.2 oz; SIZE 5 (black): 1.09 - 1.56", 10kN, 3.5 oz; SIZE 6 (green): 1.28 - 1.89", 10kN, 3.9 oz.