The Ansed 3.9mm Front and Side View Probe, Nos. 39FV and 39SV, allows for viewability with a borescope in the hardest to reach spots. It features an LED, multi-pin connector with threaded screw collar, 1m length and the smallest diameter probes currently available, according to the company. The probe comes designed for diesel engine, transmission, door, window frame, sunroof drain and other narrow access applications.