Specification: Product Name: Knurled Brass Threaded Nut Assortment Kit. Material: Brass Color: Gold Quantity: 330 Pieces Height: 4mm, 6mm, 8mm, 10mm Inner Diameter: 2mm, 3mm, 4mm, 5mm Outer Diameter: 3.5mm, 5mm, 6mm, 7mm Advantage: 1. Uniform spacing, clear lines, uniform force, high strength, stronger. 2. Smooth surface without burr, standard circular, firm and uniform , easy to install. 3. Not easy to rust, strong corrosion resistance. 4. No need to counterbore or countersink the boss hole since the insert has a guide pilot . 5. Packed in a handy resealable plastic storage case. Package includes: 【M2】 M2 x 4 x 3.5mm– ————————-30 Pieces M2 x 6 x 3.5mm————- ————–30 Pieces M2 x 8 x 3.5mm———————— —30 Pieces M2 x 10 x 3.5mm- ————————20 Pieces 【M3】 M3 x 4 x 5mm ——– ——————–30 Pieces M3 x 6 x 5mm——————- ———-30 Pieces M3 x 8 x 5mm—————————– 20 Pieces M3 x 10 x