Grindometer No. 65

Path size: 0.5 x 6 in
Number of trajectories: 2
Scales: 8 - 0 Hegman / 0 - 5 Mils
Dimensions (approx.): 0.75 x 2.5 x 8 in.
Net weight: 4.0 lbs (1.8 kg)

Includes:
Metal plate with scale
Scratcher
Case