Not long after we started selling the Equalizer® glass gun channel cleaner people started asking us for a shorter version. The longer version works great when you need to go down deep inside doors, but sometimes you need to clean glass out of a channel that is not down inside the door. Our RS1389 short glass run channel cleaner measures only 13" long and is perfect for cleaning the upper channel. The metal part of the channel cleaner is 8" long.