colors : black， red， purple， orange， blue， green， pink MATERIAL: 1，Shoes: A total of propionic create new material， bright color， high strength， good flexibility; 2，Wheel Material: import PU， with high flexibility， high wear characteristics3，Fixed bar and screw: oxidation process， highly rust-proof;4，Bearings: high strength carbon steel ABEC-5/7， smoothly without resistance;5，Elastic: high elasticity and toughness， not deformed loss of elasticity Feature:1，Reliable， you can adjust the size of the middle screw2，Shoelace convenient， free installation on flat shoes， detachable3，Easy to control the center of the body， suitable for beginners4，50KG apply for the following persons， children favorites Applicable methods:1，Use a screwdriver to loosen the screw on the shoe rack2，Using both hands， pull the ends of the wheel it3，The shoes put up， stuck in the shoe heel4，Using both hands， both ends of the wheel inward to shoot down (with shoes and between pulleys to close) 5，After adjusted the width of the shoe and tighten the screws removed6，Put your feet up， the tension on the buckle， to prevent loosening SIZE : free size (Adjustable)Condition: Brand new with tag.Item includes: one pair of Roller SkatesNotes: color differences allowed for light effects