Insize 3521-40, DIGITAL TUBULAR INSIDE MICROMETERS, 6-40″, 6940561981971

Resolution .00005″/0.001mm.
Micrometer head 6-7″
Accuracy: [.00005(3+n+L/2)]”, n=number of rods, L=maximum measuring length (inch)
Carbide measuring faces
The diameter of extension rods is .866″
IP65 dust/waterproof
Supplied with setting standards