Heel caps measurement: these heel caps are U-shaped and they have 3 sizes, 8 mm, 9 mm and 10 mm; The metal pins have 2 diameters, 2.4 mm and 3 mm, fit your shoes well

Strong material: this set of heel tips is made of TPU (thermoplastic polyurethanes) and iron of good quality, durable and wear-resisting, can last for a long timeUseful shoe replacement heels tips: heel tips make it comfortable for your sole of foot when you are walking, and the rough surface can prevent slipping thus much saferAvoid noise: these replacement dowels can help to reduce the noise made by your heel and the ground, so that it will not produce loudly sound when you are walkingQuantity: there are 6 pairs of heel caps in the package, thick metal pin for 3 pairs (each cap size for 1 pair), thin metal pin for 3 pairs (each cap size for 1 pair)