Parts are especially high frequency use parts to connect parts. The movement becomes smooth by putting it between metal fittings and metal fittings. When you want to make a heavy duty, such as a heavy product, it is a thick Kan when connecting the heavy parts, and a thin Kan is recommended when making delicate accessories. * the surface coating may be removed due to friction. * the total number is standard. Because it is weighing and weighing it by weight (g), there is a possibility that the number of goods of the same size has a slight difference in each lot, and the number may be back and forth. Please understand beforehand.