High Quality Felts:All pieces are made of quality fibre-optic felt which are designed to last longer and provide better protection for your cymbals. Smooth Fitting Sleeves:Ensure that your cymbals are perfectly positioned at the height in order to allow complete control of setting up your drum set and delivering good performance. And they can be trimmed to size and adjusted accordingly to fit cymbal stand diameter. Protects cymbals from becoming scratched and due to metal to metal contact. Wing Bolts and Washers:They can help to secure your cymbal and felt together tightly, making sure you'll never miss a beat (or cymbal) from spinning cymbal problems. Constructed with stainless steel and aluminium core to help protect from long term damage or rust. Drum keys:All made of high quality chrome-plated steel, are fit for all drums with standard 1/4 inch socket square tension rods whether electronic drum kit or traditional drum kit. The spinning camber design of the continuous motion key makes it perfect for quickly and easily removing and replacing drum head. Material:Felt + plastic + metal Colour:Silver + gray Package Contents: 9 x Cymbal sleeve with base (8 - 10 mm) 18 x Cymbal felt (8 - 10 mm) 12 x Hi-hat clutch felt (6 - 8 mm) 6 x Hi hat cup felt (6 - 8 mm) 9 x Wing nut (8 mm) 9 x Washer (8 mm) 3 x Standard drum key 3 x Continuous motion speed drum key Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.