Grindometer No. 54

Path size: 2 x 5 in
Number of trajectories: 1
Scales: Hegman / Microns
Range: 8 to 0 0 to 100
Dimensions (approx.): 0.75 x 3.5 x 7.5 in
Net weight: 8 lbs (3.6 kg)

Includes:
Metal plate with scale
Scratcher
Case