Sleeving Kit, Green UV, Sleeving, Heatshrink Tubing, & Cable Ties PC Cases Kit Green UV Sleeving Kit Blue. If you're tired of boring cables running through your case and want to add some spice, we have the perfect solution for you. This UV reactive cable sleeving kit not only makes your case look great, but also improves airflow, reduces clutter and protects your cables. With over 30' and 4 sizes of sleeving this kit contains more then enough to do your entire system. 30 Days