The Sanitaire Silver Series II membrane diffusers are the most widely used fine bubble diffused aeration systems available today. They feature a long-life membrane that provides a uniform aeration pattern for optimal oxygen transfer. The unique membrane shape, integrated O-ring and top-sealing threaded retainer ring eliminate leakage, which reduces energy consumption and raises operating efficiencies. Reliable oxygen transfer efficiency is not only a function of the diffuser itself, but also an important component of a properly designed and applied aeration system.