【Universal 12 Inch Size, Easy Replacement】direct installation if matching your original tires. Compatible with most manual wheelchairs for quick and simple replacement. 【Solid Puncture-proof Tire for Safe Traction】prevents air leakage, burst and puncture, with outstanding wear resistance. Patterned tread delivers reliable grip on wet floors for secure riding. 【Metal Bearings & Integrated Hub】Built with metal bearings and one-piece high-density hub frame for excellent load and pressure resistance. It rolls smoothly, steers flexibly and features sturdy structure. 【Quiet Soft Tire for Silent Environments】Made of soft full rubber material to minimize rolling noise, ideal for quiet spaces such as homes, homes and hospitals. 【Lightweight Design, Two Material Options】Lightweight structure makes the wheelchair easy to push and maneuver for daily use. Two styles available: TPE tire with dual air channels for shock absorption & pressure resistance; integrated foam PU tire for superior wear and performance.