LD239 Replacement Battery Back Catalog number: 2702-19341 Availability: In the manufacturer's stock Price on request - + Recommended 800810 Precision Rotameter, 0-4LPM Price on request 801914 Economy Rotameter, 0.4-5LPM Price on request 800811 Precision Rotameter, 0.2-2.5LPM Price on request