Non-Responsive Yoyo Axle: Size C 6.35mm x 12.7mm x 4.762mm, suitable for most non-responsive yoyos, e.g., T9... Responsive Yoyo Axle: Size C 6.35mm x 12.7mm x 3.175mm, suitable for most responsive yoyos, e.g., K1/V6/K7/D2/V3/T9 responsive yoyo series... Remover Tool: Length 68mm, outer diameter 6.35mm, easily removes any size C axle without damaging your yoyo. 100% Polyester Yoyo String: Approximately 113cm/44.4 inches long, adjustable length. Made of 100% durable polyester (colors are random, specific colors cannot be requested). Package Contents: 2 x 10-ball gold non-responsive yoyo axles 2 x U-shaped 8-ball non-responsive yoyo axles 2 x narrow C responsive yoyo axles 1 x removal tool 6 x yoyo strings (random colors, specific colors cannot be requested) 3 x 8-ball axles 3 x 10-ball axles Note: Lighting and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.