Optimized English Version Material Composition Premium PVC + Polypropylene (PP) + 304 Stainless Steel Bearing ●Silent design structure ●Enhanced durability & wear resistance Critical Size Information ●Refer to Photo 2 for exact dimensions ●Key Measurements: ▶ Wheel diameter & thickness ▶ Screw hole spacing (center-to-center) on the caster base ●Important Notice: ✦ Non-universal design - specific sizes fit specific suitcases ✦ Double-check your original wheel measurements before purchase Package Includes ●Replacement wheels ×2 pcs ●Mounting screws (compatible with wheel design) Product Features ●Professional-grade abrasion resistance ●Silent operation: Reduced noise during movement ●Compatibility Requirement: ✦ Must match original wheel's hole spacing & shape ✦ Recommended for users with DIY experience Custom Fit Assurance Unsure about compatibility? 1.Email us: ●Clear photos of original wheels (top/side views) ●Screw hole spacing measurements 2.Our engineers will provide: ▶ Compatibility verification within 24hrs ▶ Installation guidance if needed Package Includes ●Replacement wheels ×2 pcs ●Mounting screws (compatible with wheel design)