Fangrui Product Details Features: . Application: Mini-rail For Installation Of Trapezoidal Photovoltaic Panels On Walkable Trapezoidal Metal Sheet Roofs With Metal Sheet . Good Static Load Distribution. This Type Of Installation Reduces The Suction Effect Of The Weight Of The Pv System On The Outer Skin Of The Roof Covering. No Need To Transport Long Profile Strips, Adjusted To The Post Spacing Of The Profile Panels. Profile Sections Are Pre-drilled And Covered With Sealing Tape. Description: Rail Size: 200mm End Clips: For 35mm Solar Panels Assembling: 1. The Division Of The Roof Depends On The Size Of The Module. 2. Align The With Chalk Lines. 3. Place The Bracket In Place, Pre-drill Holes With 5.00 Mm Sheet Metal And Secure With 4 Blind Rivets. Or Use A Thin Sheet Metal Screw To Fix It Without Pre-drilling. 4. Place Row With A Wooden Template And After 10 Rows, Check The Orientation Again With A Piece Of String. Material: Aluminum Alloy Colour: Silver Package Contents: 4 X Rails (with Accessories Gasket + Screws) 4 X Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.