1, Anti-slip 2, Anti-rust 3, Full range in bearing bar size and mesh size ... high strength for uses in most industrial and commercial applications.3.The advantages, specific application and features of steel grating ... the modern trend.The best drainage: Leakage area of 83.3 percent, more than twice of cast iron products. Hot ... 20, 23.85, 25, 30, 30.16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, 80mm ...