【New Year Sale】8,000 yen → 6,500 yen 【Daily Discount Sale in Progress】Starting at 6,500 yen, Today 2,700 yen New, unused frame. Comes with demo lenses and backing card. A vintage frame from the mid-Heisei era. It was found in the warehouse in very good condition. This is a high-quality junior full-rim frame that was sold at a retail price of 18,000 yen at the time, featuring super-elasticity. Kooki Sports Flex is an eyeglass frame that uses Ni-Ti alloy for the temples and bridge. Compared to conventional products, it offers superior comfort and stability, and has advantages such as being less likely to lose its shape, less likely to break, being lightweight, and not rusting. Frames for children are quite expensive from most manufacturers. Masunaga Optical's frames for children are recommended even at university hospitals. Frame Details: Size and Color Model Number: KOOKI J-25 #4 Frame Width: 130mm Lens Vertical Width: 40mm Single Lens Width: 50mm Nose Width: 15mm Temple Length: 130mm Front Color: MAT_W Silver Matte Temple Color: MAT_W Silver Matte 【About the Material and Characteristics of the Product】 Ni-Ti alloy is an alloy with a 1:1 atomic ratio of nickel and titanium, which translates to a weight ratio of 55% nickel and 45% titanium. This alloy can exhibit super-elastic and shape-memory properties depending on factors such as heat treatment and degree of processing. Super-elasticity is the property of returning to its original shape when force is removed, even when bent or stretched like rubber. Kooki Sports Flex is designed to exhibit its super-elastic properties most effectively within a room temperature range of 0°C to 40°C. 【About the Product】 This frame is a high-quality eyeglass frame manufactured with strict inspection at the Masunaga Optical Malaysia factory, a long-established frame manufacturer in Fukui Prefecture. This frame is from Masunaga Optical's Kooki brand, but the processing was done at Masunaga Optical's Malaysia factory. Management/Storage No. J-25 50 #4・(Yellow box of J-25)