Size and color: M10 nut and bolt caps, wrench size 17. Color: Black, Number of pieces per pack: 100 pieces. MATERIALS AND QUALITY: All our hole fillers are made from high quality plastic that resists warping, UV rays and all weather conditions. PERFECT DESIGN: Designed with extreme attention to detail, the nut covers feature a core thick and unique design with snap-on tabs to permanently cover hex nut bolts. It forms a harmonious whole, thus giving the final product an aesthetic appearance. Safe: nut covers and screw covers protect protruding hexagonal screws and nuts from the elements and to a large extent prevent the corrosion and rust. The shape of the hexagonal cap also prevents injuries. Installation and use: Assembly is extremely simple thanks to the hexagonal tabs. Nut covers are used in the general construction sector, for the construction of machinery and equipment, furniture, play equipment and other elements of garden architecture, where aesthetics and quality are of paramount importance. Nut covers are designed to protect the metal holes of nuts from damage. They protect the connection between screws and nuts. Screw caps designed for a variety of applications Note: The data is all measured manually, please allow 1-3cm error Due to differences in light and display, there may be color differences, please refer to the actual item received.