Technical Data:
Product type: Tubular Inside Micrometer, Extension-Pipe Type
Measurement: Inside dimension
Reference setting: Optional reference gage required for accurate setting
Measuring faces: Carbide-tipped
Graduation: 0.01 mm for metric models / 0.001 in for inch models
Series: 139
Measuring range: 100 - 900 mm
Micrometer head stroke: 25 mm
Extension pipe quantity: 5
Main unit range: 100 - 125 mm

Content:
Extension pipes:
25 mm
50 mm
100 mm
200 mm
400 mm

Dimensions:
Series 139 family reference drawing:
Representative family assembly is shown with an overall reference length of 2075 mm
Left measuring tip Dia.=8 mm
Right measuring tip Dia.=8 mm
Reference outer diameters=Dia.16 mm, Dia.20 mm and Dia.18 mm
Left-end reference length=4.5 mm
Micrometer-body reference length=47 mm
Right-end reference length=3 mm
Measuring faces=SR10 both ends