Size: small, medium, large (divided according to mask size)Accessories: silicon mask, nebulizer cup, 2.5m PVC tubingMaterial: mask Medical silicon rubberNebulizer cup Medical PC & PPTubing PVCAdvantage of nebulizer cup: good sealing, no leakage, low noise, nebulizing speed adjustable.Silicon mask advantage: soft, comfortable, and healthySingle patient use only