Dimensions: Polishing wheel diameter is 8 in. (200mm), center hole 5/8 in. (16mm). White polishing wheel thickness: 50 layers (about 12mm) Yellow polishing wheel thickness: 40 layers (about 16mm). The standard size makes it suitable for 8-inch bench grinder and bench buffer Purpose: Polishing wheels mounted on bench buffers or bench grinders are used for buffing jewelry, hardware, plastics, glass and metals, such as brass, stainless steel, aluminum. Buffing, waxing, cleaning items Installation: The center hole of the polishing wheel is inserted into the adaptor rod of the bench buffer or bench grinder, or the pointed shaft, and transfer shafts. Make sure the installation is tight, then start rotating at a low speed, adjusting the speed as needed for polishing Quality: The polishing wheels used for buffing are all made of high-quality cotton, and the white polishing wheels are soft and delicate, adding smoothness to your items. The yellow polishing wheel throws away debris. The cotton cloth is made of a new one piece, and the hole is in the center position (the poor polishing wheel, the cotton cloth is patchwork, the center hole deviation is large, the rotation is unstable, and the noise is large) Type: Buffing Usage:Installed on bench grinder, bench buffer,using polishing wax on cloth wheel, buffing jewelry, metal, glass, etc.,Make items smooth and shiny Colour:Yellow+white Material:cloth Package Contents: 1 set x bench grinder accessories(random style, don't accept the specified ) 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.