The Trojan 602854 is the correct replacement UV lamp for the following filter systems:
The Trojan 602854 - PRO-10 Replacement UV Bulb fits the Trojan UVMAX Model G, G Plus, and PRO10 UV filter systems. This Pro 10 UV light replacement helps reduce Cryptosporidium and Giardia, bacteria, and viruses in your water. This Trojan UV lamp includes 2 O-rings and has a life of 18,000 hours. The Trojan UV bulb is environmentally friendly and highly efficient.
Trojan 602854 - PRO-10 Replacement UV Bulb specifications: