AND Apollo GF-A [GF-403A] Multi-Functional Precision Balance with External Calibration, 420g x 0.001g - 128mm x 128mm. The A&D Weighing GF-403A Apollo Precision Balance, 420g x 0.001g is robust and durable. The GF403A features Compact Super Hybrid Sensor(C-SHS) that makes the scale compact, fast, and precise. The GF403A includes a wide range of modes to meet workflow needs.