This PVC ultra-flex hose is made for Schedule 40 pipe fittings. The hose's black color makes it ideal for use in fish ponds and water gardens, as it is practically invisible underwater. PVC Flex Hose is somewhat flexible, very durable and a alternative from using PVC Pipe. Use slip fittings over hose to eliminate restrictions such as when using barb fittings. Algae growth inside this hose is inhibited, as the black color resists sunlight. Withstands up to 50psi. Fish Safe. Color is Black.