The UV Pure Quartz Sleeve w/ Seals (GDQ-XL) is the genuine OEM quartz sleeve assembly designed for use in Hallett 1000 Series UV disinfection systems. The precision-formed quartz sleeve provides the transparent protective barrier surrounding the UV lamp within the treatment chamber, allowing the lamp to operate in a controlled environment while maintaining the required optical clarity for UV transmission. This assembly includes the correct sealing components for a secure, leak-tight installation and proper lamp seating within the housing.