[Replacement Part Number]--Part number:5801632 BY6105 PWC-5A [ PWC-5A Compatible With Engine]--on-marring, shock-absorbent polyurethane bowstop fits Super Jet, Waverunner, Kawasaki, Polaris, and similar PWCs [PWC-5A Fits Model]--Fit for JET Ski Waver Runner, SeaDoo PWC,Stoltz BOW STOPS Trailer Bumber PWC-5A & Hitch Pin [Product Specification]--3 1/2 inch opening,Fastens with 5/8inch x 6-1/4inch Hitch pin,5/8inch hole in Vertical stop Fit for JET Ski Waver Runner, SeaDoo PWC,Stoltz BOW STOPS Trailer Bumber PWC-5A & Hitch Pin Part number: PWC-5A BY6105 On-marring, shock-absorbent polyurethane bowstop fits for Super Jet, Waverunner, Kawasaki, Polaris, and similar PWCs 3 1/2 inch opening Fastens with 5/8inch x 6-1/4inch Hitch pin 5/8inch hole in Vertical stop Hitch pin with cotter pin 5/8inch x 6-1/4inch Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:plastic+metal Package Contents: 1 x Trailer Bumber PWC-5A & Hitch Pin Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.