... U Shaped Circular Box Iron,ISO9001 Hot-Dipped Galvanization,Black Enamel 20/25/32mm BS4568,BN50086 Standards Item:Black Enamel U Shaped ... way,2-way,3-way,4-wayBlack enamel u shaped circular boxes,to BS4568 and EN50086 standards. ... reasonable price.We can produce the black enamel u shaped circular boxes according to your samples or ... fittings and pipe accessories. Black Enamel U Shaped Circular Box