Horseware Rambo Elasticated Bungee Cord Used to replace the usual tail strap, this elasticated PVC-covered cord is flexible and easy to clean, taking the pressure off fittings and straps. Specifications: Sizing: For blankets up to 69 use a 12"/30cm tail cord For blankets 72-75 use a 16"/40cm tail cord For blankets 78-81 use a 20"/50cm tail cord For blankets 81 on up use a 24"/60" tail cord