Dental Ex-Probe, XP23-8. Stainless Steel Handle. This Ex-Probe is an excellent combination instrument for dental diagnostics. It has an explorer tip (EXS 23) on one end and a probe tip (CP 8) on the other. The probe tip has markings at 3, 6, 8, 11 mm. Product code: XP23-8  or  EXS 23 with CP 8