Premium MaterialStainless steel. The bracket has high rust resistance and does not rust, prolonging the service life and saving terminals. Quantity and Sizes25PCS greenhouse glass clips are 7.7*3cm/ 3 * 1.2 inch, 25 Z overlap clips are 1.2 * 0.9 cm / 0.5 * 0.4 inch, with high level of stability. Excellent FunctionThe spring clips greenhouse protect your plants, vegetables, fruits and lettuce from hail, rain, wind and intense sun in all seasons. Wide UsesSuitable for almost all aluminum frame greenhouses, a variety of materials, such as hollow slabs, multiple wallpapers, glass greenhouses, etc. Warm House HelperIn the event of a typhoon or thunderstorm, you can prepare these clips in advance to strengthen the windows of your greenhouse in order to avoid any damage.