All Sterilight UV systems include a quartz sleeve, which surrounds the lamp. The quartz material used in R-Can's quartz sleeves are a 100% fused silica which lend to the sleeve's high transmittance. A high transmittance is important as the UV light must travel through the sleeve to get to the water.  

There are a variety of quartz sleeve designs, depending on the system that they are being used in. The QS-950 is a domed quartz sleeve which is used in the Platinum™ and Cobalt™ series only. All replacement sleeves are shipped with two 410867 O-rings.
The QS-950 Quartz Sleeve is compatible with SPV-20, SPV-950, and the SP950-HO UV systems.

Specifications:   
Origin: Fabricated in the USA
Warranty: One year manufacturer warranty