Applied to 1 1/8inch-2inch(30-50mm) Thick framed solar panel Quality Material: these solar panel mounting brackets end clamp are made of quality aluminum with good and compact structure, the surface is produced by fine manufacturing technology, not easy to rust or corrosion, so they can you for a long time Easy to Install: these adjustable end size can be adjusted according to the different solar panels, you only need to install it in the target position, saving your time and energy, which is convenient to install Wide Range of Applications: designed with an adjustable end clamp design, these aluminum adjustable solar end can be adjusted for different solar panels, suitable for frame solar panels ranging from 35 mm/ 1 3/8 inches to 50 mm/ 1 15/16 inches Bolt Size:M8 x 20mm, Stainless Steel Color: Silver Material: aluminum Package Contents: 12 x Solar Panel Mounting Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.