18 Gauge premium grade 304 series stainless steel.Includes a removable basket strainer inside the drain which catches hair and other debris from entering your drain, allowing you to pop off the cover lift from the basket strainer and clean it out once in a while.2" slip in drain diameter.This linear drain includes a solid cover with no hole or lines in it. The water drains from all four sides around it.Shower drain base not included but is required and available as model # ABDB55 in PVC or ABDB55CI in Cast Iron.