The SLE350 and SLE500 Air Compressors are an ideal air source for all SLE ventilators when piped-in compressed air is not available or when you need a back-up air source for added protection. Easily accessible filter and indicators make regular maintenance simple and cost effective. Large, lockable castors provide effortless mobility and stability. Medical grade dry, clean, oil-free air Portable, with locking castors 40 l/min or 60 l/min maximum flow rates Quiet in operation Low maintenance Main gas supply back-up mode