rigid endoscope 1:CE certificate,ISO9001 2:small diameter :2mm Feature:Rigid endoscope1.Super small endoscopy diameter up to 2mm.2.With the Light Source ,the foci can be adjusted manually.3.The endoscopy with supper small outside diameter can be used in checking little objects ,such as the burrs in the foundry industry, the inside situation of the engine etc. industry rigid endoscope