for 3 glass spring clamp is made of stainless steel, which is rust-proof and durable.Compatibility: These for 3 Pro bed are compatible with 3 Pro, 3 V2, 3S, 5 Pro -20 PRO 3D printers and other 3D printers.Installation : Press down the two spring plates and slide the clip to the heating bed and glass bed. At the same time, make that the top of the clip does not Contact the glass until it is fixed in place.colour: silverMaterial: stainless steelPackage Contents:12 x Glass clamp(2 Styles)Only the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.