Big Horn Dust Collection Univers Adaptor is designed to efficiently reduce dust collection hose sizes from 4 inches to 1 inch outer diameter, with step options of 2-3/4 inches, 2-3/8 inches, and 1-7/8 inches outer diameter. This versatile adaptor allows you to simply cut off the sections you don’t need, making it easy to customize for your specific dust collection setup. Constructed with a heavy wall thickness, it is durable and stands up well to hose clamp pressure, ensuring a secure and reliable connection for your dust collection system. Model Number: