I remixed this file to fit my RV strip lights. My Rv has LED lights above the slideouts that are very bright. These diffusers help immensely. I printed them in Sunlu Ceramic PETG and they allow just the right amount of light to emit. Designed to be printed on the A1. I adjusted the file in all three directions to fit my need. Each piece is 240mm long. I used 15 for each one of my slides. Thanks to the original file designer.