1.Specification:7/8",1" 2. Stainless steel 304, 316 3.Heavy Duty Top Slide,stainless steel top slide 3.Mirror polished 1. Heavy ... Duty Top Slide,stainless steel top slide Casting: investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process.2. Materials ... . Quality control: According to ISO 9001 2001 SS316 Heavy Duty Top Slide for Bimini Top