The Screw is stainless parts. HQ Mount Manufacturer Stainless Steel Solar Clamp Z Shape Mounting Bracket For Fixing Z Nut Kit P146 Z Bracket 35mm To 50mm Solar Panel Assembly Mounting Z Bracket Kits 4 Units Adjustable Solar Panel Bracket Z21 Plus 0.96 inch TFT LCD Color Screen Smart Bracelet IP68... The Z Adjustable mounting brackets can works for 50W-150W panels which should be work with guide rails. About this item Smarkey Solar Panel mounting Z brackets are very easy to use,and can adjust the size of the Z parts from 1.38inch to 1.96inch ( 35mm to 50mm). The Z Mounting Brackets are Manufactured of High Quality Aluminum and Therefore are very Light Weight and Convenient The Z Mounting Brackets are Manufactured of High Quality Aluminum and Therefore are very Light Weight and Convenient.
