ZERO THRESHOLD: shower floor creates a virtually flush entry to the shower; actual threshold measurement is 1-in but when installed, the difference against flooring is approximately 1/8-in TRIMMABLE: trim up to 4-in in width away from either side of drain or up to 2-in in depth away from drain without any loss of integrity MATERIAL: sheet molding compound (SMC) material is made from a composite material composed of resin, fiberglass, and stone filler to create a lightweight and durable material that is stronger than acrylic 3-IN-1 THRESHOLD: versatile base can accommodate a single, double or triple threshold installation DRAIN: center drain location with modern rectangular stainless steel drain cover that conceals a conventional 2-in shower drain, creating a pleasing uniform and minimalist design; drain not included