[Size] Internal Diameter: 4.2 mm / 0.17", Outer Diameter: 7 mm / 0.28", Length: 7 mm / 0.28". Not threaded.||[Application] It is used to keep boards at a consistent height and prevent the joint from bending, twisting, and short-circuiting with a middle partition design. Fit for 3D Printer, TV Wall Mounting, Electrical Outlet, Pegboard, Robot, Drone, Fpv, Quadcopter, Computer, Shutters Locks.||[Durable and Reliable] Insulated Nylon, Strong and Reliable, Easy to Install, and Durable to Use.||[Feature] These spacers have advantages over the metal spacer. They are lighter, do not rust, and are less brittle, also widely used in electrical products.||[Package Content] 300(+/-2%) x Black Nylon Round Spacers
