Manufacturer: Marine Hardware
You are buying a Marine Hardware 24" grab rail, stainless steel with a part number SSGR10007.
Part Number: SSGR10007
O.D. Tube: 3/4" x 1"
Tube Type: Oval
Length: 24"
Stud Distance (Center to Center): 23"
Stud Size: 5/16" --18 x 1-3/4"