The Von Duprin 958003-00 Quiet Electric Latch Retraction Retrofit Kit is designed for 3' doors compatible with the 33, 35, 98, and 99 series. Crafted with durable heavy-duty materials, this kit ensures long-lasting performance. Each part is carefully manufactured to match specific finishes and series, guaranteeing a seamless fit and enhanced functionality. Upgrade your door hardware with this reliable retrofit kit for smooth, quiet latch retraction. Don't miss out, enhance your security and convenience today!