Designed to fit U36 catch basins.  Also,  when used with a 4'x5'x6" adapter slab, will fit U52 catch basins. The U37 Curb Inlet is a precast concrete box reinforced with 4"x4"/#6x#6 welded wire fabric and 2"x2"x5/16" ``T" bar.

The solid concrete lid is designed to be heavy enough so as to avoid vandalism and can be removed only by access through the inlet opening.  The lid is protected by a galvanized metal ring along the circumference.