Grindometer No. 45

Path size: 0.5 x 4 in
Number of trajectories: 2
Scales: 8 - 0 Hegman / 0 - 5 Mils
Dimensions (approx.): 0.5 x 2.5 x 6.75 in
Net weight: 3.5 lbs (1.6 kg)

Includes:
Metal plate with scale
Scratcher
Case