Use to test #3 down nozzles, #6 poppets, #8 poppets. Comes in a padded case for easy storage. It includes 3 ea 2 1/2"gauges: 0-30 gauge will measure pressures from 0-30. 0-100 gauge will measure pressures from 0-100. 0-200 gauge will measure pressures from 0-200.