Instant purchase OK! No price reduction except for multiple purchases! Please comment if you wish to purchase multiple items! This is a set of 6 pairs (12 pieces total) of upper and lower mouthpieces. There are no instructions, so please refer to the following 【How to Use】. 【How to Use】 1. Warm the mouthpiece in 90-100°C (194-212°F) water for 5 seconds (The softening temperature varies depending on the season) 2. Remove from the hot water and cool for 10 seconds 3. Press firmly against your teeth to create a mold 4. Trim off any excess with scissors to shape ※ We are not responsible for any burns or injuries resulting from improper use, so please use at your own risk. 736 Dra12☆New