P0000345 Carhartt Pets Lighted Collar This durable collar with water-resistant LED safety light will give you ease of mind as you and your pet work and play after the sun goes down. Plastic side buckle with built-in 3 mode red LED safety light for night time visibility Light is water resistant and has changeable battery Reflective triple needle stitch for low-light visibility Fully adjustable Rugged slotted metal D-ring with tag holding capability Plastic strap keeper and adjuster Fabric Durable nylon webbing with duck canvas weave Sizing Medium Length: 14-18 inches. Width: 3/4 inch Large Length: 18-26 inches. Width: 1 inch