Technical Data:
Tubular inside micrometer
Range: 100-4000mm
Micrometer head: 100-150mm
Travel of micrometer head: 50mm
Graduation: 0.01mm
Accuracy: 60um
Carbide measuring faces
Heat insulation extension rods
Heat insulation extension rods: 50mm, 100mm, 200mm (2 pcs), 500mm, 1000mm (3 pcs)

Dimensions:
Extension rod diameters: dia.20mm for 50/100/200/400/800mm rods; dia.34mm for 500/1000mm rods
Measuring end/reference diameter=dia.7mm
Thread=M14x1
Spherical radius=SR20