LED Safety Dog Collar 3 Mode Flashing Light up Glow in the Dark New dog safety collar with Thin LED Strip Light With one switch control built-in battery is in the plastic cylinder, and the battery is changeable 2.5cm comfortable robust black nylon with easy to attach clip Available in Small 11" - 22cm and Large 17" - 44cm neck Sizes and 6 different Colours Fast Shipped From Bristol UK