This is a set of two hard-type appliances. Description: For those concerned about teeth alignment, overbites, snoring, or teeth grinding, or those who want mild orthodontic treatment! It fits gently on the teeth and gums, and can be easily removed by yourself. Material: Plastic Suitable for: Ages 12 and up Type: Transparent, hard type *Individual differences may vary. Single items and soft types are also available. Thank you for your consideration. Please also check my profile. Available for immediate purchase(^^) If you wish, for an additional 50 yen, we can offer anonymous shipping (Nekopos), which is faster than regular mail.