Instant purchase is welcome. No comments needed. This is a sale of cable bushings (black) only. Quantity: 8 pieces Size: Outer diameter 30mm, Inner diameter: 22mm Side groove: 3mm Height: 9mm These are used to protect cables when pulling them out, but they are silicone rubber products that can be used for a wide range of board thicknesses and other purposes. I purchased a large quantity for a utility model right (patent application). I am selling only the ones I didn't use. Stored at home. Although they are new and unused, there may be dust, dirt, debris, burrs, etc. due to the nature of the material. Please understand this before purchasing. I am selling them at a considerably low price. They will be shipped by regular mail, but if you wish to have them shipped by Yu-Yu Mercari delivery, please comment (plus 100 yen).