Reducing a 4 inch dust port on your machinery has never been easier! With our 4 inch to 2-1/2 inch hose reducer fitting and rubber coupler you can connect a 2-1/2 inch hose directly to a 4” port on machines like band saws, table saws, large planers and more. This convenient combo pack is designed to accept most standard size 4 inch dust collection fittings such as Y’s, T’s, Elbows, Blast gates, Dust ports and other standard size 4 inch dust collection fittings. Most wet/dry vacuum hoses will plug directly into the smaller end of this fitting making it a super value for most professional and us weekend warrior type woodworkers. There are some vacuum units that use different size hoses and hose adaptors so please be sure to measure your hose and machine ports before making a purchasing decision. Two stainless steel hose clamps help provide a tight seal on the 4 inch end and keep the reducer from falling out. These clamps fit neatly into the slots around the coupler so there is no slipping when tightened. No more busting your knuckles. Each clamp is equipped with a blue turn key mechanism to make tightening and loosening the clamp super easy. The rigid rubber coupler seals tightly around the reducer for excellent airflow. Easy to install and easy to remove. As with most all other dust collection fittings, it’s always a good idea to have extra on hand for when you need it. It’s always better to have it and not need it than it is to need it and not have it. Made from high quality ABS plastic for extended periods of use, the reducer fitting will withstand the constant friction and debris flow of woodworking dust collectors. The reducer measures: Nominal 4” end is 3-61/64” OD and 3-41/64” ID; 2-1/2” nominal OD end measures 2-15/32” OD and 2-9/32” ID. Dimensions may slightly vary due to slight variations in the manufacturing process., Weight: 1.0 Pounds, Manufacturer: Peachtree Woodworking Supply Inc.