Multiple Sizes Available: 15, 21, 25, And 29 Inches, Suitable For Both Carry-On And Checked Luggage, a Single Set Meets Your Diverse Travel Needs.Lightweight And Shatter-Resistant: Made Of High-Toughness Pp Material, It’s Lighter, More Pressure-Resistant, And Less Prone To Deformation Than Abs.Quiet, Smooth-Glide Wheels: 360° Universal Wheels For Smooth, Silent Travel.Thickened Aluminum Alloy Handle: Stable And Smooth, Easily Handling Various Loads.Waterproof And Scratch-Resistant: The Matte Finish Resists Scratches And Ensures Durability.