The ST-WVBS from Stanlay is a Borescope with Depth of Field(DOF) 1 to 6 cm, Field of View(FOV) 46 Degree (H), 56 Degree (V), Probe / Insertion Tube Diameter 5.5 mm (Tip Insertion Tube), Probe / Insertion Tube Length 1 to 10 m, Probe / Insertion Tube Length 1 to 10 m. More details for ST-WVBS can be seen below.