LD239 Replacement Battery Back Catalog number: 2702-19341 Availability: In the manufacturer's stock Price on request - + Recommended 800811 Precision Rotameter, 0.2-2.5LPM Price on request 801009 Rotameter/Flowmeter, GilAir-3 Price on request 401248 Diagnostic Panel Flow Tube/Rotameter, Replacement, Price on request