Package Includes: You will receive 4 pcs dental retractor. Size: 145*45*20mm, 167*55*24mm. Material: T shape orthodontic retractor opener made from tough, eco-friendly, durable plastic to last long, its ideal for extended use in dental offices. Easy to Use: It can open the mouth of the patients completely during the treatment, and hands available for oral inspection. Design: Owing to the special design, it can be easily operated and made the patients comfortable. It helps give you an unobstructed view of the oral cavity. Widely Applicable: This plastic dental cheek lip intraoral mouth opener is suitable for examining oral cavity, and also nice for using in dental clinics and whitening salons. Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Material: plastic Color: black Size: S: about 145 * 45 * 20 mm L: about 167 * 55 * 24 mm Package includes: 4pcs * openers (2pcs large + 2pcs small)