the specification of alemite is described as follows: 1.material:brass 2.colour:brass 3.length:10mm 4.D:4mm 5.type:have steel ball the type alemite is designed for bearings,they are popular to cars,marine,agricultural machinery and other big machine. we offer all the products we have shown on alibaba.and we also can produce the products as your drawings. our products have high qualiy and competitive price. welcome to coopoarte with our company.