2" Tactical E-Collar CoverMade from 2" nylon webbing Adjustable from 19" to 23" Includes bungee loop for expansion Elastic material completely hides receiver Fits most current model receivers E Collar Receiver Sold Separately [split] The Redline K 9 Tactical E Collar Cover is designed to completely conceal e collar receivers from view. Made from 2" Nylon webbing and finished with a 2" plastic buckle for easy on and off, this collar features a bungee loop to allow for expansion