Instant purchase OK! No price reduction except for multiple purchases! Please comment if you want 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 use the product referring 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. Take it out of the hot water and cool it for 10 seconds 3. Press it firmly against your teeth to create a mold 4. Trim off the excess with scissors to shape it ※ We are not responsible for any burns or injuries caused by improper use, so please use it at your own risk. 736 Dora 12..