What is this?PVC rigid- pipes are mainly in water pipes. The inner wall of PVC pipe is smooth and does not limit the flow of liquid. The hard pipe is suitable for outdoor use and can be used in direct sunlight. The pipes are also widely used in DIY decoration, cable sleeves, etc.What will I get?Round pipe, is in size of : 21mm/0.83-inch inner dia, 25mm/1-inch outer dia, 0.5m/20-inch total length 15.5mm/0.61-inch inner dia, 20mm/0.79-inch outer dia, 0.5m/20-inch total length 16mm/0.63-inch inner dia, 20mm/0.79-inch outer dia, 0.