Description: Widely suitable for reversing railings, yard gates, sliding doors, and rail doors. Easy to install and use, providing great convenience. Made of sturdy nylon material, wear-resistant and durable. Stable and sturdy bolt ensures secure fixation and resists loosening. Features: - Color: Yellow - Material: Nylon - Size: 8.60 x 4.80 x 4.80 cm / 3.38 x 1.89 x 1.89 in - Constructed from high-quality nylon material for long-lasting strength and durability - Thoughtful design helps reduce vibration, enhancing practicality - Precision craftsmanship provides good flexibility, allowing smooth sliding and operation - Ideal for use on sliding doors, rail doors, and various furniture applications, serving as a reliable replacement for old accessories - Convenient and practical solution that meets everyday needs Package list: 4 x Guiding Wheels