SAFE MATERIALS: Made of high quality plastic material, firm, eco friendly and practical, wear‑. REGULAR REPLACEMENT: Regular changing the elbow Keep your nasal guard with good performance, your ventilator nasal and hose cleaner after regular replacement EASY TO USE: It is well made simple and reasonable, light weight, and small in size. Easy to connect and use with good performance DETACHABLE DESIGN: It has an elbow shape that can guide the hose to where it is needed so that it t get in the way. Detachable, easy to clean, After regular replacement, the nasal mask and hose of your ventilator be cleaner EASY TO CARRY: Nasal guard an important and practical accessory for breathing machine. Light weight, small size, easy to store and carry Material: plastic colour: Transparent white Package Contents: 2 x elbow adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.