Fits,
Molded White Plastic with Broad Flange
Per ABYC "Safety Standards for Small Crafts"
Not Recommended for Use Below the Waterline 
For 1" Hose 1 1/8" Max Hull Thickness

Dimensions:
  H = 93 mm
  D = 61 mm
  D1 = 26 mm
  d = 33 mm
  d1 = 25.5 mm
  di = 18 mm