ITEM NAME:20x M12x18mm+M10x17mm Dome Nut Head Protection Caps Cover Hexagon Screw Description: Intended for Hexagon shaped Bolts & Nuts Improving the Finished Appearance of your Product Hexagonal Heavy Duty Nylon Protect Against Weathering & Tampering Enhance Finished to Nuts & Bolt Heads Specification: M12 Bolt & Nut Caps / Covers: Size: 18x23mm Inner Diameter: 23mm M10 Bolt & Nut Caps / Covers: Size: 17x19.5mm Inner Diameter: 19.5mm Package Includes: 10 pieces M12 Bolt & Nut Caps / Covers 10 pieces M10 Bolt & Nut Caps / Covers SKU: DMO0016403719392144.Intended for Hexagon shaped Bolts & Nuts. Enhance Finished to Nuts & Bolt Heads. Hexagonal Heavy Duty Nylon.