It can be installed in structures such as reinforced concrete manhole inspection troughs for discharging sewage and surface water, as well as the outer wall of water towers and climbing environments that require rust prevention.
There are two specifications: 60% fold and 40% fold, and the outer diameters are 19mm, 22mm, and 25mm.
★ One-piece molding processing and manufacturing to increase its strength
It is suitable for sewage sewers, rainwater sewers, culverts or building walls for people to go up and down.