Firestop Sleeve, Ready Sleeve, Dimensions: 0.059" x 2", Material: Zinc Plated Steel, Includes: Sleeve, Plates, Gaskets, Putty. Does installing a cable sleeve usually result in a time-consuming scavenger hunt and several trips to the supply house? You can eliminate a lot of wasted time and motion by stocking convenient and economical Ready Sleeve Kits. Ready Sleeve Kits provide everything you need to install a UL Classified and code compliant cable penetration. Ready Sleeve Kits make the job more profitable by saving the installer time at the job site. No need to cut conduit and strut. No external caulking. Ready Sleeve installs in just minutes.