Card slot & Card spring

Card slot & Card spring Used for fixing the film cover on the greenhouse structure, very easy to install. 275g/sqm zinc coated hot galvanized steel material, life time over 15 years. Thickness: 0.6, 0.7,0.8,1.0 and 1.2mm.（Contact us then will suggest the suitable thickness based on your environment) Length can be customized.