Safety Gear for Traveling with Your Dog by Car Here's what makes it great! Easy to Install: Simply clip it onto the side rings of a Julius-K9 IDC® power harness and connect the other end to the car's seat belt buckle. Size: For dogs weighing 10kg. Tips for Increased Safety: Using two on both side rings provides more stability. Important Note: Compatibility may vary with some car models (Volvo, Saab, Chevrolet, Ford, etc.), so check beforehand! This item is not designed for protection during collisions, but to prevent your dog from jumping out during sudden braking or when the door is opened.