None 2.5 in. x 3.375 in. Clear Standard Mortar Weep Vents (200-Piece Box)

Mortar Maze Weep Vents ensure positive drainage in all cavity wall construction, while also restricting insects and other debris from entering the head joint. Made from durable polypropylene, Mortar Maze Weep Vents are available in a range of colors to match the surrounding mortar. Polypropylene tested in conformance with ASTM D2240, D790B, D638, and D1238B.