AND Apollo GX-A [GX-403A] Multi-Functional Precision Balance w/Internal Calibration, 420g x 0.001g - 128mm × 128mm. The A&D Weighing Apollo GX-403A Precision Balance, 420g x 0.001g features a super hybrid design, construction, and algorithms. The GX403A offers password protection for up to 11 users and 1 administrator. The GX403A's stainless steel pan and dust plate can be easily removed for cleaning. The GX403A is easy to assemble anti-static breeze break on 0.001 readability models.