Feature: *Brackets for fixing structures for solar photovoltaic or similar s to folded sheet metal roofs. *Aluminium standing seam clamp. The screws and washers are made of stainless steel. The clamps are pre-assembled. Details: *Material:The product is aluminum alloy and the screws are made of stainless steel material *Color:sliver *Size: The upper and lower dimensions of the inner clip are 25.4mm 21.2mm respectively(as shown in the picture) Package Contents: 1/4pcs Aluminium standing seam clamp Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.*