Specification Name: Bicycle friction spark insoles Material: TPE Color: black Insole size: 25.5CM/10.0 inches Shoe Size:Universal Usage: Rubbing on the soles of the feet DESCRIPTION Riding a bike or skateboard: simply touch the ground with your feet and create friction. This friction creates sparks that are sure to impress. Not only is this a fun and exciting way to ride, but it will emit a dazzling light like fireworks when skateboarding at night. UNIQUE PROP: This unique prop is sure to catch the eye and add a new level of excitement to your favorite activity. Allows you to easily and securely attach them to the soles of your shoes. Simply use the included ties to secure the pads to your shoes and you're ready to go! ATTRACTION: Skateboarding shoe insoles are also great for performing cool tricks and stunts. With the added visual effect of sparks flying from your feet, your tricks are sure to be even more dramatic and impressive. Whether you're a seasoned pro or just starting out, sneaker insoles are a great way to add some excitement to your riding and skating! EASY TO USE: skateboard accessories are completely safe and easy to use. The ties ensure that the props are securely fastened to the shoes and spark without any hazardous chemicals or materials. In addition, when you are done with this bike part, you can simply throw it away without having to worry about any safety hazards. Product List. 1*Shoe Insoles 2*Slider