Fits,
Molded White Plastic with Broad Flange
Per ABYC "Safety Standards for Small Crafts"
Not Recommended for Use Below the Waterline 
For 1.25" Hose 1 1/8" Max Hull Thickness

Dimensions:
                H = 102 mm
D = 75 mm
D1 = 47 mm
d = 46.5 mm
d1 = 38.5 mm
di = 28 mm