Easy to follow illustrated instructions. Installation average time is 30 minutes per speaker. Perfect for any average do-it-yourselfer. Our YouTube videos make installation easy! FREE technical support. FREE shipping to any USA address. Join thousands of customers that have installed our New-Edge-It ® speaker foam repair kits successfully! Fits JL Audio cabinet and driver models: JL Audio 12W7, 12W7AE, 12W7-3, 12W7AE-3(Does NOT fit 12W6, 12W6 v.2) Please see our other JL kits for the 12W0, 12W3, 12W6 v.2, etc. Please check the model and size of your speakers before ordering to be sure you receive the correct foam edge repair kit.