Features: brand new and high quality Intended for Hexagon shaped bolts and nuts. Improving the finished appearance of your product. Protect against weathering and tampering. Enhance finished to nuts and bolt heads. Easy to fit and to remove. Specification: Optional Model: M6, M8, M10, M12 Material: Plastic Dimensions: As pictures shown.(approx) Size Edge Width(S) Total Height(H) Height(E) Outer Diameter(D) Wrench(Sleeve) Size M610mm(0.03in) 13mm(0.05in) 6mm(0.02in)12.5mm(0.04in) 10mm M813mm(0.05in) 15mm(0.05in) 8.5mm(0.03in)17mm(0.06in) 12mm, 13mm, 14mm M1017mm(0.06in) 19.5mm(0.07in) 9mm(0.03in)21mm(0.08in) 16mm, 17mm M1219mm(0.07in) 22mm(0.08in) 12mm(0.04in)24mm(0.09in) 18mm, 19mm Color: Black Quantity: 1 pack(10pcs) Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 pack(10pcs) x Bolt Nuts Caps(other acceories demo in the picture is not included.)