4:3 Pull Down Projector Screen with High Quality Materials and Self-Locking Mechanism * 72" Diagonal 4:3 Pull Down Screen * Self-Locking Mechanism * Dual Wall and Ceiling Mountable * High Quality Screen Materials   Optoma’s matte white fabric is composed of 4 different layers, including a sheet of weaved fibre-glass which helps stop static electricity and most importantly prevent wrinkles and waves. The screen fabric consists of a special material that helps prevent the loss of light, making it compatible with virtually every projector. The fabrics are designed to be fire, water, and mold resistant and can be cleaned if required. The outside surface of the matte white screen has microdots that are made with PVC technology. This surface helps with creating the best possible reflection, whilst new advances in screen technology help keep our matte white screen flat and retain its shape and effectiveness over longer periods of time.