Lightweight perfect round shape design. Standard size cymbal stand felts washers, available for shelfdrums.. High quality felt material, prevent metal-to-metal contact,perfectly protect your precious drum cymbals. Improve your drum cymbal sound and performance. Felt washers and cymbal sleeves and worktogether properly,and protect your drum from friction. Diameter: Approx. 25mm/0.98Inch Inner Dia: Approx. 10mm/0.39Inch Height: Approx.13mm/0.51Inch Casing size: 38*38*26mm The inner diameter is about: 8.8mm Colour: black Material: Plastic+chemical fiber felt Package Contents: 8 Pieces* Shelf Drum Cymbal Felt 2 Pieces* Cymbal Sleeves Note: Light shooting 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.