Fresh lemon coating method (fruit fresh coating agent): This is a suitable for citrus, lemon and other fruit coating preservatives.
An oropharyngeal airway (oral airway, OPA) is an airway adjunct used to maintain or open the airway by stopping the tongue from covering the epiglottis. In this position, the tongue may prevent an individual from breathing.
Guedel Airway
Maintains airway through the oral cavity and pharynx
Oropharyngeal Airway,Oral Pharyngeal Airway,Medical Oropharyngeal Airway,Opa Airway Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmed.com
First, formula. Candelilla wax 4.0 kg, oleic acid 1.2 kg, 0.05 kg xylene, 0.1 kg ethylene glycol, 0.2 kg sodium carbamate, 0.9 kg morpholine, 22.2 kg water.
Second, the preparation method. The above materials were heated to 80 degrees Celsius and melted. After adding 80 degrees Celsius hot water, the mixture was stirred well.
Third, the use of methods. When used, the lemon can be washed, dried, dip coated with a layer of coating agent, and then stored at 10 to 20 degrees Celsius. The shelf life can be extended from 1 to 7 weeks to 10 to 20 weeks. 
a. Made of semi-rigid non-toxic polyethylene.
b. Bite block and tongue depressor,Rigid bite block helps keeping the victims airway from collapsing
c. Size: 000, 00,0,1,2,3,4,5,6
Atraumatic soft-rounded edges
Smooth inner and outer surfaces
Side channels provide access for suction catheters
Flexible to ensure dental protection