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& 39;ll never miss a ryhthm (or cymbal) from spinning cymbal problems.Specifications:Material: Plastic + Felt + MetalQuantity: 18Pcs, 21Pcs (optional)Color: Black, Grey (optional)Package Weight: 260g / 9.17ouncesPackage Size: 160 * 120 * 40mm / 6.3 * 4.72 * 1.57inPacking List:3 * Cymbal Sleeves6 * Cymbal Felts4 * Clutch Felts2 * Bracket Tube Felts3 * Wing Nuts3 * Cymbal Washers