These are some mouth openers, which are made of plastic material, durable for long lasting use.Good choice to easily open the upper and lower teeth easily, suitable for dentist, can be used in dental offices, better satisfy your needs, offer good support. Features -Color:As Shown -Material:Plastic -Size:11.00X4.00X1.50cm/4.32X1.57X0.59in -Size:12.00X5.50X1.70cm/4.72X2.16X0.67in - The mouth opener can stably support the oral, facilitating dental treatment. - Made of plastic materials, thischeek retractor is sturdy, will not easy to get deformed or broken. - Can be used for dental treatment, oral examination, beauty repair and other occasions, the mouth openers fit your demands. - The mouth opener adopts ergonomic design, comfortable to wear, and not easy to fatigue, let you have good using feeling. - Good choice to easily open the upper and lower teeth, suitable for dentist, themouth openers are practical. Packing list8 x cheek retractor(4 large and 4 small)