Quantity: 100pcs greenhouse extension, Size: 3.6cm (length), 1.9cm (width), 2.3cm (diameter) Create a space between the greenhouse bubble film and the glass or plastic. Effectively prevent the PE bubble from touching and sticking to the greenhouse glass. Allows air to move behind the PE bubble insulation. Insulation protection: Suitable for fixing bubble wrap in winter and sunshade in summer. Usage: Suitable for fixing insulating bubble films, shade nets, screens on aluminum greenhouse grooved rails. Used to secure wires, shades and insulation inside your greenhouse. Save costs for your greenhouse, they can be used in many places in the greenhouse, the accessories create an individual and unique greenhouse perfectly suited to your specific needs. Makes gardening easier, more efficient and more comfortable.