Parameter: Movement Direction: Vertical Z axis Stage Size: 3.1 x 3.1 inches (80 x 80 Material: Aluminum Travel amount: ± 0.5 inches (12.5 mm) Load: 39.20 N (4 kgf) Accuracy: 0.001 in (0.03 Minimum Read: 0.01mm Weight: 1.8 lbs (0.87 kg).