Quartz sleeve designed for the Berson B80VIK UV disinfection system. Length 867 mm, diameter 33 mm. Isolates the UV lamp from water while transmitting UV energy for effective disinfection. Manufactured from high-quality quartz glass for stable performance. Berson recommends annual cleaning and replacement every 3-5 years to maintain output. Contact us if you are unsure whether this quartz sleeve fits your UV system.