... material2) Longevity: anti-corrosion, anti-rust, anti-abrasion, excellent anti-pressure capability;3) Light weight:1/3 lighte than cast iron ... ones4)Various color and pattern available on request5)Anti-theft:Non-recycle,anti-theft ... ;(2) Street lamp well, fire control well, all kinds of valve wells;(3) City water, drainage pipeline well; heat supplied, gas ...