Ugh, there's nothing worse than luggage wheels breaking right before a trip, am I right? These replacement wheels are total lifesavers when your suitcase starts wobbling or refusing to roll properly. Each wheel measures about 6cm in diameter and 9cm total height, made from durable PP+PET plastic that's surprisingly sturdy and quiet when rolling. The double-row wheel design provides better stability than cheap single wheels, and they swivel smoothly in all directions. Installation is pretty straightforward - you just need to open your suitcase's lining, remove the old wheels (usually just a few screws), and attach these new ones. The package includes 8 screws total, which should cover most standard luggage setups. Before buying, definitely check that the groove pattern on your current wheels matches these - the product photos show the exact base design. I've used these on two different suitcases now and they've held up through multiple airport runs without issues. The material feels quality - not that brittle plastic that cracks after one rough baggage claim experience. Seriously, for the price, it's way better than buying a whole new suitcase or paying for professional repair. Keep a set in your closet for emergency luggage fixes, because wheel problems always seem to happen at the worst possible times!