Description Widely suitable for reversing railings, yard gates, sliding doors, rail doors, and similar applications. Easy to install and use, providing convenient functionality. Constructed from sturdy nylon materials that are wear resistant. Features a stable and sturdy bolt for durable fixation that resists loosening. Features - Color: Black - Material: Nylon - Size: 6.50 x 3.00 x 3.00 cm / 2.55 x 1.18 x 1.18 in - Fine Workmanship: Made of high-quality nylon material, strong and durable for long-term use - Compact and Portable: Thoughtful design helps reduce vibration for improved performance - Practical and Versatile: Offers good flexibility, allowing smooth sliding and reliable operation - Creative Design: Suitable for use on sliding doors, rail doors, and various furniture applications as a replacement for old components - Easy and Long-Lasting: Functional design provides reliable performance and meets everyday needs Package List 4 x Guiding Wheels