Replacement Strut for Large Offset Catamaran Strut System, pn# 502b36This is the replacement strut ONLY. See picture 1. Picture 3 shows the system that this strut is used with.Includes:(1) aluminum strut with installed 3/16" (4.75mm) Lead Teflon Bearing Sleeve.Specs:Height: 80mmBarrel length: 50mmDiameter stuffing tube: 7mm or 9/32 can be used but needs a bit of sanding to fit.