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These products can also effectively resist the penetration of air,water and gas,and achieve the satisfactory sealing and energy saving effects.Our products,including the ribbons with vertical burrs,transverse burrs and rubber,have the advantages of low friction,high strength,perfect sealing and temperature preservation,and lasting durability.These producs comply with the BS6375 and BS5368 standards,pass the Level-3 separated airtight and watertight tests,go beyond the GB7107-86 Grade-2 standard for air permeation,and accord with the strict manufacture standard for building aluminum profiles in China and American.We will always serve the doors and windows industry by guaranteed quality,reasonable price and trustworthy goodwill.We promise to provide you the most immediate and reliable service.Clients,both old and new,are welcomed to make orders personally or by letter and telephone.We are enthusiastically waiting for you.