The Round End Cap is designed for 1-3/4” Rub Rail and has a total length of 2-1/4". The outer diameter is also 1-7/8" and requires one(1) #10 fasteners for installation purposes (not included). Lastly, this highly polished Round End Cap is investment cast 316 stainless steel—being extremely durable for long-term use without corrosion. *Fasteners not included