QM Square Shower Drain, Grate made of Stainless Steel Marine 316 and Base made of ABS, Lagos Series Mira Line, 4 inch, Satin Finish, Kit includes Hair Trap/Strainer and Key Grate and frame are made of 100% stainless Steel Marine 316. Offers the longest life span in the market and also the most corrosion resistance from water softener and cleaning chemicals. Lagos Series: Grate thickness 1.8 mm = 15 gauges Base is made in ABS plastic. ABS (same plastic used by LEGO) is known for being a tough, hard, rigid & chemical resistance material Base Frame prevents damage to the grout when the grate is removed Hair strainer basket comes with every QM drain, strainer fits inside the drain to collect hair and other debris, preventing pipe clogs. Also, keeps insect and small rodents from coming up thru the sewerage system. Empty basket as needed to maintain optimal performance. The use of the basket is optional Lifting key is included to assist with grate removal Amazing Quality Trendy Designs Passionate About Stainless Steel Nature Friendly Take Pride In Every Detail 15 Years Of Experience Technologically Advanced Energetic Team We Can Answer Your Questions and Concerns Socially Active