●Stainless steel hose connection clamps (2): adjustable holes with a clamping range of 91 to 114 mm diameter, easy to adjust to your different hose sizes. ●Hose couplings: adjustable size, perfect for tightening the hose and preventing leaks. The buckle on the back is designed to prevent the force from slipping. ●Applications Mainly used for fixing pipe fans and hose connections. Widely used for ventilation whole homes, cooker hoods, air conditioners, tumble dryers and other ducts. ●Stainless Steel Hose Connection Points The hose clamps are made of stainless steel, wear-resistant and strong, not easy to rust, easy to remove, and can be used for a long time. ●Easy to Use Loosen or tighten the screws of the hose clamps with a screwdriver. Then adjust the size. Hold the pipe tightly (Note: screwdriver not included).