Length: 31.34″ Provides Superior Water Purification Warranty: 2 years [recommend to replace every 10month] Bulb Type: T5 Style Quartz Glass Base: 4Pin T5 Ceramic Base [4pin on ONE End] Glass Type: Quartz Glass Tube Average Life Time: 10,000hrs Fits MODELS: DWS-12V, SE-12V, EV-12E, ATS4-793 Ultraviolet light water filters are a highly effective way to protect your water supply from bacteria, viruses, cysts, and many other organisms. Ultraviolet (UV) systems use a specialized UV lamps and bulbs such as in this listing that produces high quantities of damaging ultraviolet light. Any organisms passing by the light are destroyed. Ultraviolet systems do not add any dangerous chemicals to the water and are very easy to install and maintain. Our lamps are fully certified by the manufacture and quality assurance testings. All Aqua Treatment Services brand, trademarks, logos are property of Aqua Treatment Services. Please do not copy any of the data on this page. All trademarks above, trade names or company names referenced herein are used for identification and reference purposes only and are the property of their respective owners.