1️⃣ 🛡️ **9H Scratch-Proof Hardshell Suitcases** ✓ Aerospace Aluminum Frame+ German PC: Holds 100lbs without bending ✓ 9H Scratch-Proof Hardshell Surface: Survives baggage belts ✓ 8 METAL Corner Guards: Reinforced impact protection 2️⃣ ✈️ **FAA-Compliant Check-in Luggage Sizes** ✓ Precise Sizing: 20" inch Carry-On (7.0lbs) | 24" inch Medium/XL (8.8lbs) 26" inch Large (10lbs) | 28" inch Extra Large/XXL (11.5lbs) ✓ Fits Delta/UA/AA requirements 3️⃣ 🛞 **360° Silent Spinner Wheels and handle** ✓ 8mm Double-Layer TPR: Self-cleaning anti-jam grooves ✓ <30dB **SILENT**: Cobblestone tested ✓ Sealed Ball Bearings: Smooth on all terrain ✓ 3-Height Handle: 4'11" to 6'7" Users 4️⃣ 🔒 **Zipperless Security + TSA Lock** ✓ **NO ZIPPER**: Eliminates broken zipper failures ✓ Metal TSA Lock: 10,000-cycle tested (-4°F~140°F) ✓ Anti-Pry Design: Bolt cutter resistant ✓ 3-Step Setup: 10-second programming 5️⃣ 📦 **Big Capacity Design** ✓ True 28 inch Body + 2 inch Wheels = 30 inch Total Height (Industry Standard) ✓ Russian-Doll Nesting: 28 inch ←24 inch←20 inch ✓ 40% Storage Space Saved ✓ X-Strap Compression: 20h flight wrinkle-free SIATELOO 3-Piece Zipperless Luggage Set with Aerospace aluminum Frame, 28/24/20 Inch Checked Suitcases & 22x14x9 Airline Approved Carry On, Hard Shell PC with Spinner Wheels and TSA Lock - Silver