These quick release collar straps are both suitable for our E-Collar Technologies and Dogtra Products for their bark collars and remote trainer receivers. The quick release collar options are very convenient and once you get the perfect fit for your dog's neck, you never need to fiddle around fitting it after that - just snap the quick release on and off. This upgrade strap can take the guesswork out of fitting your dog's collars at the right tension. The bungee connection also expands and contracts with neck as the dog exercises and becomes aroused. This is available in the standard and quick release optionAll collars come with black rivets and silver buckles. Product Options To ensure the correct fit to your system please refer to the below guide. For Dogtra Products you must select the 1" Collar Option *Dogtra IQ PLUS takes a 3/4" width. IMPORTANT NOTE for Educator Collars: 1" collar straps fit our large, low-high power RX-120 & RX-150 receivers only! These receivers come standard on 800, 1200 & FE-580 series. All other models use the 3/4" wide straps Quick Release Bungee E-Collar Strap (comes with quick release clip) Standard Bungee E-Collar Strap (comes with standard buckle, no quick release clip) Length guide: The shortest length is 28-32 cm (there can be a slight variance) at the longest point these come up to 82cm long (strap can be trimmed with scissors to cut off excess) Colour Options: Black Blue Brown Green Lavendar Lime Green Magenta Orange Pink Purple Red Teal Yellow