Super loud bell:Our bell is very loud. Each bell contains a stainless steel minimum motion clapper that makes the bells very sensitive to ringing with even the slightest movement. High-Quality Materials:Our bells are handmade in our factory using copper which is proving to be hard wearing when exposed to the elements. Cats and dogs especially spend a lot of time outside, so we've made sure these bells are built to last. Efficient tracking:Our bells will allow birds and small wildlife to hear when your cat or dog may be trying to persue it, giving it enough time to escape and allow you to track your dog when it's out of sight. Perfect size and weight:16 mm x H: 18 mm, product weight: 10g including split ring, Ideal for smaller cats.The light bells will not burden their bodies. Apply to:Suitable for cats and dogs, even some large small animals. Package includes: 4x Extra Loud Cat Dog Bells,2xRings Specification: the loudest,clearest,most durable handmade bells available Copper,expertly welded by hand to produce outstanding quality.Minimum motion clapper rings the bells with the slightest movement. High quality and customer satisfaction are our tenet. We hope that customers can use our products and serve them satisfactorily