Respironics Diamond Designed for ease of use and to support compliance, OptiChamber Diamond’s mouthpiece and anti-static VHC potentially allow more respirable drug to be delivered to the patient than with a pMDI alone Pari Vortex Non-electrostatic metal valved holding chamber eliminates static charge and ensures patients receive a more consistent dose of medication Peak Flow Meters Personal Best® Full Range Peak Flow Meter (60-810 L/min) This peak flow meter has a built-in Asthma Management Zone System and Daily Record Chart.