750 pcs Assortment of sheet steel screws round head Head sizes from 2.5 - 4.0 mm Lengths from 10 - 25 mm Black, Sorted in 8 diversified sizes: (head length x length) 2.5mm x 10mm (100pcs) 3mm x 12mm (100 pieces) 3mm x 16mm (100pcs) 3mm x 20mm (100 pieces) 3mm x 30mm (50 pieces) 4mm x 16mm (100pcs) 4mm x 20mm (100 pieces) 4mm x 25mm (100pcs)