Suitable for wet locations. Heavy wall, impact-resisant PVC. Threaded 1/2" NPT [13mm] hub with ground wire. Slanted bottom accepts conduits of different depths. PVC stabilizers included (no concrete needed). 3" O.D. [76mm] x 19" [483mm].* Accepts "Y" or "T" fitters (by others). Available in black. May be painted additional colors with water base paint. Use with UL Listed wet location fixture. UL and cUL Listed.