The 1/2" ID HoseCoil PRO provides a 47% increase in flow rate over 3/8" ID. HoseCoil PRO features a large 4.75" coil for better ease of handling and dual strain reliefs to reduce kinking. The HoseCoil PRO is not only larger in size, it is made with much thicker material for added strength and durability. Built with 3/4" garden style fittings, it fits all standard US hose connections.