Locks & Latches descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. 150pcs/set M3 Brass Knurl Insert Nuts- Metric Threaded. Features: 100% New and Made of brass material, Durable and Practical to Use 150pcs M3 Brass Thread Heat Setting Insert Plastic 3D Printing Metal Nut Supplies With Good Corrosion Resistance and Never Rust, Durable. With a Plastic Box, You Can Organize the Nuts in an Organized Way, Making It Easier to Carry and Remove. Different Sizes of Nuts Can Meet Your Different Needs. The Knurled Nut is Well Surfaced and Will Not Scratch Your Hands. Widely Used in the Machinery Industry. Specification: Material: Brass Nut Type: M3 Quantity: 150 Content: M3x3mm 30pcs M3x4mm 20pcs M3x5mm 20pcs M3x6mm 20pcs M3x8mm 20pcs M3x10mm 20pcs M3x12mm 20pcs Package Contents: 1 Box of M3 Knurled Nuts (150pcs Set) . Products number : SOMONO112493