Hex Key, 2mm Back Catalog number: 380-0036-01-R Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0007-01 Battery Pack, Replacement for Gilian 5000, 800i & Price on request 811-0944-02-R GilAir Plus, DL to DL BlueTooth and Motion Upgrad Price on request 297-0012-01 USB Communications Cable for Nephelometer Price on request