Roll down Mosquito for Windows is a very good solution to keep mosquitoes, flies & other pests out. This product is ideal for casement windows & top hung ventilators. Roll down Mosquito net has top cassette with spring, a pulling handle & Side guides. The brain of Roller Mesh is SPRING & the heart is Fiberglass mesh. Insect Shield uses German Spring Steel in the spring which is tested for 100,000 cycles enough to last a lifetime. T.I.E. – Italy has an exclusive arrangement with us and the Roller mesh we manufacture uses only T.I.E. Basic Fiberglass mesh – Hard variety. We have ensured that both our heart & brain are the best. The side guide has best weather-strips sealing brush ensuring no leakage of insects. Aluminium profile is 6063 T6 from Jindal Aluminium& is exclusive design for us. Insect Shield uses only Akzo Nobel the world best powder coating company.