Features 1. Material: Stainless steel, double-layer electroplating, to prevent rust. 2. Ring Puzzle Specially designed to test your brain,helps with practicing concentration and focus. 3. Metal puzzle brain teaser condenses with traditional Chinese culture and they are quite interesting to creative thinking and improve both your IQ and EQ. 4. Metal Wire Puzzle set suitable for kids and adults,especially those who like to be challenged, but not for the children under six. Contains small parts, do not put into the mouth. 5. Gift: Christmas gift, holiday gift, birthday gift, reward, etc., suitable for various occasions. Specification Material: Metal Color: Yellow, Blue, Pink, Green Size: 11 2 2 cm Weight: 130 g Package Include: 8x Set of Metal Wire Puzzle