Material: Stainless steel.The bracket has high rust resistance and does not rust, thus extending service life and saving terminals. High quality greenhouse glass clamps ensure the safety of your greenhouse.Suitable for a variety of materials, such as hollow slabs, multiple wallpapers, glass greenhouses, etc. Suitable for almost all aluminium-framed greenhousesUsed to install greenhouse glass into an aluminium frame When typhoon or rainstorm comes, you can prepare these clips in advance to strengthen your greenhouse glass panes to prevent damage. Packaging includes50pcs 304 Stainless Steel W wire clips,50pcs 301 Stainless Steel Z overlap clips