[Premium Material and Durable] – Made of high-quality nylon, these round screw spacers are resistant to temperature, oil, corrosion, and tearing, ensuring long-lasting performance. [15 Sizes for Versatility] – This kit includes 15 different sizes, totaling 345 pieces, suitable for various screw types and applications. [Ease of Storage and Identification] – The spacers come in a labeled plastic storage box for organized and quick identification. [Functional Benefits] – Lightweight, rust-resistant, dimensionally stable, and electrically insulating, these spacers help maintain flush mounting of plates against surfaces for secure installation of outlets and switches. [Wide Applications] – Suitable for electronics, automotive components, machinery, toys, and other general-purpose uses. Commonly used to protect LEDs on circuit boards and in industrial or DIY projects. Material: Nylon Color: Black Package Contents: 345 x spacers Note: Color may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 mm.