Big Horn 11448 4-Inch by 2-1/4-Inch Tapered Adapter. The small end of 11448 has an inside diameter of 2-1/4 inch which duplicates the 2-1/4-inch opening on your Shop-Vac. Insert the Shop-Vac brand hose to the vacuum and the other end to the small end diameter of this fitting to power the dust collection system. These fittings provide a step down from a larger main line to smaller branch lines. This step-down increases air velocity near the machine where it's needed most. This reducer connects to a standard 4 inch dust collection hose and should be secured with a hose clamp.

Features:

• Dimensions: Height 4-1/2 inch x Depth 4-1/4 inch
• 4-Inch and 2-1/4-inch Inside Diameter
• 4-Inch end connects to standard 4-inch dust collection hose
• 2-1/4-Inch end connects directly to shop vacuum hose
• Create healthier work environment
• For best connection use clamp (not included)
• Lightweight and portable; Made of tough and durable black ABS plastic