• Constructed From High-Density EPS (Expanded Polystyrene) Foam • Includes 2 PROVA LINEAR PAN®, 2 Side Supports And 2 Filler Strips • Can Be Used To Build A Linear Shower Base • Replaces The Need For A Mortar Base • Can Be Used With Either PROVA BOARD® PLUS Tile Backer Or PROVA-MAT® Membrane To Waterproof Shower Walls • Pan And Related Components Can Be Used To Install PROVA LINEAR DRAIN® (Sold Separately) • Premium Polymer-Modified Thinset Mortar Required For Installation (Premixed Mortar Or Mastic Are Not To Be Used) • Mfg #TT8901PAN02