Great to have on hand for gigs and rehearsals. Wing nuts are made of stainless steel. Cymbal felts are made of high-quality felt. Durable with long service life. Emergency kit for drummers – Makes a great stocking stuffer. Butterfly nut size: 41 x 20 x 12mm Internal diameter of about 8mm, compatible with M8 screw rod Gasket size: 8 x 24 x 2mm (inner diameter x outer diameter x thickness) Casing size: 38 x 38 x 26mm Inner diameter is about 8.8mm Medium felt pad size: outer diameter 40mm, inner diameter 10mm, height about 15mm Packing size: 10 x 10 x 5cm Color: black Material: stainless steel, plastic, chemical fiber felt Package Contents: 2 x cymbal sleeves with base 2 x 8mm wing nuts 2 x 8mm washers 4 x cymbal felts Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement may vary by +/- 1-3cm.