This is the collar core specifically designed for Eriyoshi's Nagajuban, the "Kirakku Nagajuban" replacement collar. When the collar area becomes misshapen due to repeated washing, inserting this collar core will help maintain a beautiful curve at the neckline. How to use: 1. Spread out the replacement collar and insert the collar core into the inner part of the collar. 2. Fold the spread-out collar and return it to its original shape. The shape conforms to the replacement collar, making it very easy to use. Material: Vinyl chloride (Set of 2) Color: White This collar core is exclusively for "Kirakku" products. The shape differs from standard collar cores. Manufacturer: Eriyoshi Co., Ltd. Made in Japan Suggested Retail Price: 660 yen *Please note that if you purchase the collar core alone, shipping will be via Takkyubin Compact, and no discount is available. If you purchase this item together with the Kirakku Juban, etc., which are listed separately, we will offer a discount on the shipping cost, so please inquire. #KirakkuJubanDedicatedCollarCore #CollarCore #Eriyoshi #KirakkuJuban