Rhombus Nimbus 399 Series casters combine aesthetics, quality, and functionality into a brilliant design. Not only is the Nimbus 399 quite possibly the most visually appealing healthcare caster ever created, it also meets stringent requirements for medical equipment hygiene. Suitable for use in autoclaves, the Nimbus 399 Series features a die-cast aluminum, load-bearing housing and a highly-polished, gently curved plastic cover. Precision ball bearings in the swivel raceway provide smooth swivel action. Caster stems meet industry standard to integrate with existing central locking brake systems.