Features: High quality Sensory Enhancement Design: Mini finger skateboard accessories encourage and enhance children's senses, exercise hand and brain coordination, stimulate hand-eye abilities, and promote DIY customization of finger toys. Qualified Material: Made of qualified alloy bearings, round and polished without burr, wear-resistant, non-metal components to improve play experience. Easy to Assemble: Finger skateboard wheel set includes all necessary accessories, easy to assemble and replace, extends service life of your finger skateboard toy; universal size fits most finger skateboards. Durable Finger Skateboard Spare Parts: Durable wheel brackets suitable for replacement on mini finger skateboards, extend product life, provide effective exercise and training for kids' finger flexibility, ideal for indoor fun anytime. Color: Silver Material: Zinc alloy Size: 29mm Package Contents: 1 x Small screwdriver (random color, no specific color selection) 10 x Truck sets (including screws, wheel nuts, sps) Note: Light and display differences may cause slight variation in color between image and actual item. Measurement error allowed is +/- 1-3cm.