[Premium Material and Durable]- Made of excellent nylon material, these round screw spacers are resistant to temperature, oil, corrosion, and tear, ensuring a long service life. [15 Sizes for Versatility]- This assortment kit includes 15 different sizes, with a total of 345 pieces, suitable for various screw and sizes, making it convenient for different applications. [Easy to Store and Identify]- The nylon spacers come in a plastic storage box with size labels, providing easy organization and identification of different spacers, saving time and effort during use. [Powerful Functions]- Lightweight, rustproof, stable, and insulated, these spacers are designed to hold the plate flush against the wall, providing a secure and reliable installation for outlets and switches. [Wide Applications]- These plastic spacers are suitable for use in electronic products, automotive manufacturing parts, machinery, toys, and more. They are widely used to protect LEDs on circuit boards and can be utilized in various industries and projects. Material: nylon colour: Black Package Contents: 345 x spacers 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.