... , black, ZpCr3, yellow zinc, hot dipped galvanized and Dacromet Shape: U Size: M6 to M36 or 1/4 to 1-1 ... according to different standards and customer's requirements.Name:U Bolts Shape: U Standard: ISO, DIN,ANSI/ASME, BS, JIS, UNI,GB ... to M36 or 1/4 to 1-1/4 inches U Bolts