... circular , conduit box 2)) 20mm ,25mm 3) pvc material 4) electric or construction 5) M4 screws ,white or black 1)pvc conduit box ... conduit2)size:3X3'' and 3X6'' , 1 way box , 2 way bos ,through way box , U box , Y box , sizes : 20 mm , 25mm3)color: white ... 1) pvc pipe fittings are used as surace mounting control box ,junction box or general service box2)Good combustion-resistant ,good insulation ...