pack ortogrip orthonyxia wires 6 sizes ruckOrtogrip orthonyxia wire pack All clasps feature an asymmetrical plastic grip for a perfect hold (longer side for the thumb) in a variety of colors: Blue = size 1, small roof, wire thickness 0. 3 mm Green = size 2, small roof, wire thickness 0. 35 mm Pink = size 3, normal roof, wire thickness 0. 35 mm Orange = size 4, normal roof, wire thickness 0. 4 mm Yellow = size 5, larger roof, wire thickness 0. 4 mm White = size 6, larger roof, wire thickness 0.