This dryer lint filter is used to collect lint during the dryer cycle, to prevent damage to the machine and to prevent lint from sticking to clothes. This model comes in white and is easy to install. It slides into the lint filter slot in your dryer. If there is visible damage to the screen then it's time to replace the part. Check your user manual and model number to see if this is the right part for you. Make sure you empty the lint filter after every use of the dryer and check the filter slot for an excess buildup of lint, which can shorten the life of your filter and be a fire hazard. The screen is approximately 20 inches in length, not including the handle, and around 8.5 inches wide.