https://www.capesmedical.co.nz/shop/Anaesthesia+and+Respiratory/Spirometery/Mouthpieces++BVF+Filters/NDD+Flow+Tube+Spirette+for+EasyOne+Air+Oblong.html
Flow Tube Spirette for EasyOne Air (Oblong)
The NDD EasyOne FlowTube mouthpieces have been engineered to fit perfectly into NDDs EasyOne Air device to guarantee reliable and high quality measurement...
flowtubeeasyoneairoblong