Maintenance kit can be Compatible with:  the following models: T400 UV Absorption O3 Analyzer and its equivalent E series. This kit contains the following items:

• 1 - ORIFICE, .0135 RED/YELLOW
• 2 - FILTER, SS
• 2 - SPRING
• 4 - ORING, SAMPLE FLOW 

Typically ships within 2 to 5 working days, depending on inventory availability.