About drain cover the design and manufacture of steel lattice panels, widely used in urban roads, squares, gardens, docks, airports, parking lots, roads, railways, industrial engineering, and other industrial buildings. Features beautiful appearance: simple lines, silver exterior, modern trends. Best drainage: leakage area of ??83.3%, more than double cast iron. Hot-dip galvanizing: rust-proof, strong, maintenance and replacement. Security design: cover and frame and with a hinge connection, security, easy to open. High strength: strength and toughness is much higher than cast iron, can be used for docks, airports and other large span and heavy load conditions. Specifications: meet different loads, the required span, size and shape