This is a high-quality Kochek Chimney Nozzle with a 1½\" NH size. It is compatible with any fire protection equipment that requires a 1.5-inch nozzle. The brand Kochek is well-known for producing durable and reliable products, making this nozzle a great addition to your fire safety arsenal. The type of the nozzle is specifically designed for chimney application, ensuring that your fire protection needs are met. Whether you are a business owner or an individual looking for a reliable fire protection nozzle, this Kochek Chimney Nozzle is an excellent choice.