Stainless Bimini Top Insert – 7/8″Top Fittings connect to tubing as a Top Cap or Top Insert for7/8 round tubing. Top Fittings create an attachment point and function as a pivot point as part of a Bimini top system. Pin size 1/4.Requires 1/8″ Allen wrench to install. Constructed of corrosion resistant investment cast 316 stainless steel.*Stainless tube wall thickness 0.049.WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.