DA-SP-190-W16, DIMENSIONAIR, DA-SPEC-190, 9-0-1, USE W/4O FOOT HOSE, Air Gages, Modified, Code- AV
DA-SP-190-W2, DIMENSIONAIR, DA-SPEC-190 5-0-5 DIAL, USE W/30 FT HOSE
DA-SP-190-W1, DIMENSIONAIR, DA-SPEC-190, 5-0-5,USE W/3 FT HOSE, Air Gages, Modified, Code- AV
Mahr Federal Pump Barrel Air bore gages. DA-SPEC-190 Dimensionair® with a choice of three available ranges:
Dial 5-0-5: Range ±0.127mm ±.005in
Dial 8-0-2: Range+0.200/-0.050mm +.008/-.002in
Dial 9-0-1: Range +0.225/-0.025mm +.009/-.001in.
Most companies that are making these new go with the +.005 to -.005 range where the repair houses go with either +.009 to -.001 or +.008 to -.002.