The VP8c titanium disc probe has a 2.1mm outside diameter flexible nylon sleeve with a titanium disc probe head.

The probe head is 8mm outside diameter and 2.5 mm high.

The head has 4 holes drilled around the edge for sutures to provide stability during measurements.

Fibre separation is 0.5mm.

Light is delivered via a central window and at a right angle to the cable.