The Trojan 602732 is the correct replacement quartz sleeve for the following systems:
The Trojan 602732 Quartz Sleeve - UV Max C & D Systems provides thermal protection for your UV lamp and defends against potentialwater damage. This Trojan replacement sleeve fits the Trojan UVMax C, C4, D, and D4 ultraviolet water disinfection systems, and ensures high UV light transmittance through 100% fused silica. This UV quartz sleeve is domed on one end and should be replaced when worn or broken.
Trojan 602732 Quartz Sleeve - UV Max C & D Systems specifications: