【Premium Material and Durable】- Made of excellent nylon plastic material, these round screw spacers are resistant to temperature, oil, corrosion, and tear, ensuring a long service life.

【15 Sizes 】- 15 Sizes: 50 Pcs 3x7x1; 40 Pcs 3x7x3; 15 Pcs 3x7x5; 15 Pcs 3x7x8; 15 Pcs 3x7x10; 15 Pcs 3x7x12; 15 Pcs 3x7x13; 15 Pcs 3x7x15; 50 Pcs 4x7x1; 40 Pcs 4x7x3; 15 Pcs 4x7x5; 15 Pcs 4x7x8; 15 Pcs 4x7x10; 15 Pcs4x7x12; 15 Pcs 4x7x15. A total of 345 pieces, suitable for most screws.

【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.