Grate is 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. Centrally located 2" Outlet Pipe Pre-pitched channel drain eliminates the ponding of water. Allows water to flow properly to outlet. Channel Frame prevents damage to grout when the grate is removed QM Adaptor with gasket thread into most common 2" ABS, PVC or Cast Iron shower drain flanges. Adjustable to desired height QM Linear Shower Drain: Delmar is our crown jewel. It is the perfect combination of unique modern design and the highest quality you will find in the industry. Delmar offers you the only line of drains made entirely of Stainless Steel Marine 316 from top to bottom for unmatched corrosion resistance and minimum maintenance. It gives you the most design versatility. It offers you the opportunity to choose or combine linear and center shower drains according to your preferences. Also, you can choose any of the five designs patterns including the “tile-in” option of surface material in the center channel for a seamless look. Available in several sizes and finishes.