300mm Mounting System Kit Solar Panel Holder for Roof, Sheet Metal 30-35mm Thick
Note: Only several solar cells need central clamp, 1 solar panel does not require a centre clamp. For 2 solar panels, you need 6x rail + 4x end clamp + 2x centre clamp. For 3 solar panels, you need 8x rail + 4x end clamp + 4x centre clamp.