【 100% PC Hard Shell Suitcases 】Three layer BAYER Polycarbonate material from Germany. This texture is extremely scratch-resistant. Being highly durable and fall resistant to protect your belongings throughout your journey. 【 Suitcases with Wheels 】SJ.TOBOL Super Silent Wheel,composed of precision shaft center and thickened TPE wheel skin,designed with enhanced smoothness and wear-resistance for a long-lasting durability. 【 Luggage with TSA Lock 】YiF TSA Lock provide added security and safety for your belongings during travel and customs inspectors. 【 YKK Reinforced Zipper 】Used in most entry luxury brand hard shell suitcase.3 times stronger than normal zipper. 【 Aluminum Alloy Stepless Stop Pull Rod 】The lever can be adjusted to any height you want. 20 inch carry on luggage and 24 inch hard shell suitcases with three layer BAYER Polycarbonate material