Evarbuild Helps give you an unobstructed view of the oral cavity.It doesn't stretch lips or let you feel uncomfortable.Easily get varied view for orthodontic treatment.Plastic material and for single useDescription:Product Name: Lip RetractorMaterial: ppColor: TransparentM: 10.4cmx8.5cmx2cmPackage Contents:3 x Cheek RetractorsOnly the above package content, other products are not included.Note: Light 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.