All the wing nuts are made of high-quality stainless steel, all the cymbal felts are made of quality fibre-optic felt which are designed to last longer and provide better protection for your cymbals. Features: All pieces are made of quality fibre-optic felt which are designed to long life-time using. Essential drumming emergency kit with replacement cymbal and hi-hat felts, combined with full set of new cymbal stand wing bolts and sleeves, suitable for boom stands. Set your cymbals in perfect positioned at the optimum height, which will help you control the setting of your drum set and delivering in good performance. Wing bolts and washers can help to secure your cymbal and felt together tightly, making sure you'll never miss a ryhthm (or cymbal) from spinning cymbal problems. Specifications: Material: Plastic + Felt + Metal Quantity: 18Pcs, 21Pcs (optional) Color: Black, Grey (optional) Package Weight: 260g / 9.17ounces Package Size: 160 * 120 * 40mm / 6.3 * 4.72 * 1.57in Packing List: 3 * Cymbal Sleeves 6 * Cymbal Felts 4 * Clutch Felts 2 * Bracket Tube Felts 3 * Wing Nuts 3 * Cymbal Washers