& Model: 444 2 × 400g A + B & Product Description: Made of soft materials which thixotropically mold by adding vulcanizing silicone resin. Due to its platinum hardening system, this material seldom shrinks and has no stimulating effect on the human body. Ear impression materials is generally relatively soft, non-toxic paste silicone material, through a syringe injection external auditory meatus and ear concha, navicular fossa, fossa triangularis and other parts. After a few minutes the silica gel material becomes hard and can be easily removed from the ear. Is characterized by non-toxic, no stimulation to the skin, the coagulation time is moderate, easy to separate from the external ear skin, viscosity moderate, high stability.