Mounts inside the end of 3/4" Aluminum tubing. Mates with the Deck Hinge or Jaw Slide. Bimini Top Hardware, Accessories and Parts Eyes, Jaws and Deck Hinges, in Nylon and Stainless Steel. Use Black or White Nylon fittings on Aluminum Bars. Use Stainless Steel fittings with Stainless Steel Tubing. For sailboats and power boats. Beacon Fabric & Notions has Parts for Bimini Tops and Bimini Top Hardware for about 99% of all boats.