139 Series Tubular Extension Micrometers - Metric

Each set consists of inside micrometer head and a series of extension pipes of different length, which are hardened, ground, micro-lapped and heat insulated. Satin chrome finished head with positive locking clamp and carbide measuring faces.

Accuracy:
Micrometer head stroke: 25mm.
Graduation: 0.01mm.
Instrument error: ±(3+qty of rod + L/50)µm.
L = Maximum measuring length