Features: Easy to use. Good flexible, very comfortable. Can be applied in many different oral treatment procedures. Helps give you an unobstructed view of the oral cavity. Compatible with the cold sterilization and the autoclave (<135℃) Specifications: Name: dental double-headed T-Shape intraoral cheek lip Color: black Material: plastic Large size: approx. 167 x 55 x 24 mm/65.7*21.6*9.4 Inch Small size: approx. 145 x 45 x 20 mm/57.0*17.7*7.8 Inch Package includes: 4 x Large T-Shaped Lip Retractors 4 x Small T-Shaped Lip Retractors