Protect your Contempo Prep Sink, 50:50 Double or Triple Bowl Sink with these WireCraft Bottom Grids by Houzer. These protective bottom grids are made of sturdy type 304 stainless steel that's resistant to corrosion and stains. If you are ordering bottom grids for the Double or Triple Bowl models, be sure to order two grids to protect both basins from wear and tear. All WireCraft bottom grids rest easily on protective rubber boots to prevent harming the sink bottom while in use. The WireCraft bottom grids ship via UPS.