Set of 6 Vision 1234 Window Sash Weep Hole Cover - White; The 1234 weep hole cover has a one-way flap with screen to allow drainage while keeping out insects and debris. It snaps into a pre fabricated rectangular hole and accommodates vinyl thickness from 0.059? to 0.118?. It has 3 locking tabs for secure grip. 1234 is made by the same company that provides Window Hardware attached to the most popular brand Windows and Doors sold at Home Depot, Lowe's and many other window and door outlets.