<p>Merax PET material luggage is a global innovation. It is not only nontoxic and highly durable, but also has a striking appearance. It can resist temperatures as low as -4℉, and as high as 158℉. Highly durable, even a truck cannot crush our PET luggage. The added features of anti-uv radiation and anti-aging within the material ensure you will be able to use the PET luggage for over 50 years. To comply with common carry-on size limit, there's no side carry handle on 20" luggage. <br><br>HOW DO I RESET THE COMBINATION LOCK <br>1. The lock is set to 0-0-0 at the factory. <br>2. Make sure the dials are rotated at 0-0-0 or any other code you've set before resetting it. <br>3. Use a pen or something pointed to press the reset hole adjacent to the dials. <br>4. Enter your new code by rotating the dials. <br>5. Push the key button once and your code is now set. <br>6. Scramble the dials and test your new code to be sure the correct one is set. <br><br>If you need further assistance, please contact customer service. <br><br>20 INCH <br>Dimension (With Wheels): 21" x 15" x 8" <br>Dimension (Without Wheels): 19" x 15" x 8" <br>Product Weight: 6 LBS <br>Travel Days: 1~4 Days <br><br>24 INCH <br>Dimension (With Wheels): 26" x 18" x 10" <br>Dimension (Without Wheels): 24" x 18" x 10" <br>Product Weight: 8 LBS <br>Travel Days: 4~7 Days <br><br>28 INCH <br>Dimension (With Wheels): 30" x 20" x 12" <br>Dimension (Without Wheels): 28" x 20" x 12" <br>Product Weight: 10 LBS <br>Travel Days: 7~9 Days</p>