Holder type 30 V ZW M6i, knurled

Diameter: 15mm
Total length: 53mm
Thread: M6
Thread depth: 8mm
Description: Additional threads:
M8i, Ser.no.: 193.000.315

This glider with six-ball-mechanism (safety glider): 
M6i, Ser.no.: 193.000.311 
M8i, Ser.no.: 193.000.330