Mortar Maze Cell 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 Cell Vents are available in a range of colors to match the surrounding mortar. Polypropylene tested in conformance with ASTM D2240, D790B, D638 and D1238B
Standard: 3/8 in. thick x 2-1/2 in. wide x 3-3/8 in. long
Jumbo: 3/8 in. thick x 3-1/2 in. wide x 3-1/2 in. long
Packaging: 200 per box
Available colors are: Clear, White, Tan, Gray, Cocoa, Brown, Black
See photo below.