[Durability]: Made of non toxic plastic, wear resistant, corrosion resistant, can be useful on some greenhouses where the corner slots are awkward to access. [Usage]: For fastening insulation bubble wraps, film and shading nets, screens to aluminium greenhouse grooved tracks. [Package]: 50 Kits of greenhouse corner clips, supplied with washers which help prevent tearing of the insulation material. [Easy to Use]: No screws needed, simply insert into the roof channel of greenhouse and tighten to install. [Insulation Shading]: Fit for fixing bubble wrap in the winter and sunshade in the summer. Descriptions: [Package]: 50 Kits of greenhouse corner clips, supplied with washers which help prevent tearing of the insulation material. [Usage]: For fastening insulation bubble wraps, film and shading nets, screens to aluminium greenhouse grooved tracks. [Easy to Use]: No screws needed, simply insert into the roof channel of greenhouse and tighten to install. [Durability]: Made of non toxic plastic, wear resistant, corrosion resistant, can be useful on some greenhouses where the corner slots are awkward to access. [Insulation Shading]: Fit for fixing bubble wrap in the winter and sunshade in the summer. [Note]: Please allow a bit error due to manual measurement. Package: 50X Clips 50X Washers 50X Extenders (Note: Other accessories are not include.) Item Specifications: Type:Greenhouse Clips Size:4.4x2.4x1.5cm/1.73x0.94x0.59inch Material:Plastic Colour:Green