The assortments contain the following size:Pan head screw: M2x4(10pcs), M2x12(10pcs), M2.5x4(10pcs), M2.5x12(10pcs), M3x5(10pcs), M3x25(10pcs), M4x6(10pcs), M4x25(10pcs), M5x6(10pcs), M5x20(10pcs), M6x8(5pcs), M6x25(5pcs).Flat head screw: M3x6(10pcs), M3x25(10pcs), M4x6(10pcs), M4x25(10pcs), M5x8(10pcs), M5x25(10pcs), M6x10(5pcs), M6x30(5pcs).Nut: M2(20pcs), M2.5(20pcs), M3(20pcs), M4(20pcs), M5(20pcs), M6(20pcs).Washer: for 2mm(20pcs), for 2.5mm(20pcs), for 3mm(20pcs), for 4mm(20pcs), for 5mm(20pcs), for 6mm(20pcs).