Bowers XT Bore gauge extensions allow you to screw the display unit in one end and head unit at the other to increase the measuring depth of your gauge.
| EGX0200 | 63 | 2.5 | 6-10 | 1/4-3/8 | POA |
| EGX0400 | 76 | 3.0 | 10-12.5 | 3/8-1/2 | POA |
| EGX0500 | 100 | 4.0 | 12.5-20 | 1/2-3/4 | POA |
| EGX0001 | 150 | 6.0 | 20-50 | 3/4-2 | POA |
| EGX0004 | 150 | 6.0 | 50-300 | 2-12 | POA |
