316 stainless steel floor drain 
fits 1-3/8" hose and also will work well with 1-1/2" soft wall hose  
has removable strainer as shown in the photo..this helps for clean out / flushing 
overall surface diameter 3.25" 
cut out for installation 2.25" 
drain diameter 2" 
install with 3 countersunk fasteners, hole diameter 0.176"