Quantity 220 Piece Color OthersBlack + yellow + silver Material PA66 English Manual / Spec No Other Features Ultra-slim series chip tact switches; There are 11 kinds of size every size has 20 pieces; Size: 4 x 4 x 2.5mm (copper button) / 4 x 4 x 2.0mm (copper button) / 4 x 4 x 1.6mm (plastic button) / 4 x 4 x 3.0mm (copper button) / 4 x 4 x 1.7mm (copper button) / 4 x 4 x 1.7mm (plastic button) / 4 x 4 x 1.5mm (copper button) / 4 x 4 x 1.5mm (plastic button) / 4 x 4 x 1.6mm (copper button) / 4 x 4 x 0.8mm (no-cover button) / 4 x 4 x 0.8mm (button with cover) Certification CE / FCC Packing List 220 x Tact switches