Purus PF 2847 01 W 00 Envirotack Frame 28in x 47in for 26in X 45in MatsPURUS Frames are designed to be used with the PURUS EnviroTack&trademat to create a system that is easy to use in any critical or non critical area. This system is ideal for any area that does not allow for direct adhesion to the flooring surface. The frames are constructed of a hard, rigid polystyrene base material combined with a non skid backing that holds the mat in place on almost any surface. Sizes: Frame Size For Mats Part No. 20" x 38" 18 x 36