Hex Key, 2mm Back Catalog number: 380-0036-01-R Manufacturer: SENSIDYNE Availability: In the manufacturer's stock Price on request - + Recommended 783-0015-01 Lithium Ion Replacement Battery Pack for Nephelome Price on request GFPC0237 Filter, 37mm, 0.2µm, Polycarbonate, Plain White, 1 Price on request 360-0135-01 GilAir PlusQuick Start Guide Price on request