Made from PVC, will not fade, cracks or peeling, and can be used long terms Locking nut is reversed threaded, the bulkhead fitting with 4mm thick silicone seal gasket that will to the shape of the round barrels Easy installation: Can be installed on the wall, water tanks or panel Threaded connection and embedded gasket form a tight seal, not easy to slide and leak Suitable for commercial plumbing, aquariums, water tanks, irrigation, swimming pools and water parks, Manufacturer: MHADBKH