B00NV3HDCQ Buy genuine tester from 'AG Precision' store only, other sellers are selling copied / fake items. This nozzle tester is used to adjust the nozzle opening pressure, nozzle seat tightness, etc. The tester is fitted with Original Bosch plunger / element and delivery valve. (All details below) Fitted with Aluminum Cast Injection pump, Bowl with 5 micron Bosch filter, 3 way shut off valve. Item will be shipped within 2 days via DHL express and will reach you within 4 - 5 days of ordering.