FUNCTIONALITY - Connect your 4 inch dust collection hose to a 2 1/2 inch vacuum effortlessly. This essential dust hose adapter acts as a 4 to 2.5 dust collection reducer for any workshop. VERSATILITY - Optimize your woodworking setup without a massive system. This essential dust collector accessory is a versatile dust collection adapter, ideal for home workshops. BUILT TO LAST - Crafted from high-quality ABS plastic, this durable reducer ensures reliable long-term performance, making it a dependable dust collector fitting for your shop. SHOP VACUUM READY - Integrate easily with most wet/dry vacuums (please be sure to measure your hose and machine ports). Pair with a 4 inch coupler for direct machine connections. THE PERFECT FIT - For woodworkers and DIY, this 4 in hose connector provides a snug fit for your 2-1/2 dust collector fittings or hose, streamlining your setup. The Fulton 4 Inch to 2 1/2 inch reducer has been designed with a specific purpose in mind. That purpose is to connect the industry standard 4 inch diameter dust collection hose with the other industry standard 2 1/2 inch diameter dust collection hose. With a couple of hose clamps (not included) this reducer does its job perfectly and more! When it comes to 4 dust collection fittings, this is a must have.