Please check photos for full information about the item. Thanks KNF PU4889-NMP850.3 Gas Analyzers Diaphragm Pump Kit. Kit Part Number: 9978-213 Comes with instructions. The LI-78xx series Trace Gas Analyzers use a diaphragm pump to draw pressure in the sample cell down to acceptable level for measurements. Box containing 9978-187 Pump 150-14419. 8mm Philips screws 300-03761. Brass coupling (1/8 inch) Also 9978-193 Filter PTFE 1UM 25mm DIA 9978-234. Filter PTFE 0.2 um 25mm
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