CureUV Brand UVC Bulb for UV Resources 52054544 Coating:None 5mm is a 100% compatible

5mm is a 100% compatible dichoric coated curved UV quartz cold mirror that is compatible to the VTI UV systems

Drawing of Replacement UVC Bulb Item # 510419

and surface water treatment bulb that features 4 pin on a single end

End Cap: TH-6

The Replacement Quartz Sleeve for Wedeco - UV XLR-10  - 84 Watt UV Light Bulb for Germicidal Water Treatment is a good quality quartz sleeve that works effectively in your Wedeco UVC system

CureUV Brand UVC Bulb for UV Resources 52054544 Coating:None 5mm is a 100% compatibleGuaranteed Replacement Ultraviolet (UV) Bulb 2 Pin 75 Watts 34 Inch Length Lamp Worry Free Performanc for 1 Year Our CureUV brand Replacement UVC Light Bulb for UV Resources 52054544 is a 34" Double Ended High Output Lamp that gives you a worry free performance for an entire year. The lamp uses UV C light to inactivate and kill bacteria, molds, protozoa, viruses, and yeasts. High in quality, the fixture has a long lifespan and is low on mercury