Features: Make from Thermoplastic polyurethane elastomer materials that that provides for superior for comfortable, grip. This will give you a great feel on the fairways and help you perform at your best. Easy Installation: Simply rotates left when removing and right when installing until tightened fully. Suitable for most types of sports shoes, including f shoes. These essential accessorys is necessary for any f enthusiasts, to help you maintain your footings. Specifications: Materials: Thermoplastic polyurethane elastomer Color: Black Gray/White Gray Size: about 3x1cm/1.18x0.39inch Note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Package includes: 14pcs f Spikes Pin