Material: Liquid silicone<br> Size: 19*19*11cm<br> <br> Special note: This product can not be used alone, need to be paired with oxygen supply system and oxygen cylinder input oxygen.<br> <br> Product features:<br> Liquid silicone wrap adhesive PC mask body two parts<br> The headband is comfortable to wear and easy to remove;<br> Soft and comfortable liquid silicone, high definition mirror;<br> Both sides can open and close the air outlet valve;<br> Compatible with all respiratory equipment, strong airtight;<br> Ventilator connector universal 22mm diameter interface;<br> Breathing joint can rotate 360 degrees;<br> <br> Application: respiratory protection, industrial protection, industrial field, laboratory.<br> ITEM LIST: 1 set* (1 PC cover, 1 liquid silicone, 1 elbow buckle, 1 strap)