Hangzhou Dongxing Telecommunication Material Co.,Ltd is one of the professional China 100mm gray pvc fire-proof flexible air exhaust duct hose manufacturers and suppliers,Website:://.dxdxal.com, and equipped with a productive 100mm gray pvc fire-proof flexible air exhaust duct hose factory and company, welcome to contact us.Product Details    Key Specifications/Special Features:Features:Material: normal PVC net fabricAvailable sizes: 4-60 inchesStock lengths: 5/10m, customized lengths are welcomeAvailable colors: orange, grey, yellow, white, black, red, blue, green and moreFire-retardant, tear and wear-proof, oleic acid and corrosion-resistant, anti-agingStructures:Spiral steel wire wrapped by rubber strip onto PVC net fabric and one clip with D-ring punching onto the rubber strip every one meterOne end is bugle with rope, the other is steel circle collarApplications:With the portable ventilator, it's used for bad air exhausting and fresh air suction in an oxygen-poor and flammable and combustible place, such as plants and workshop, underground cable, engine room, crypt, firefight rescue and moreOther relevant information:Package: 1 piece/carton, normal neutral carton packing and special color carton as requestOEM services are provided, R