Outside Diameters: 4 inches and 2 inche.
An end with a diameter of 4 inches connects to a standard 4 inch dust collection hose.
The 2 inch end is directly connected to the shop vacuum hose.
Made of tough and durable plastic, this item is lightweight and portable.
The small diameter of 2 inches on the Big Horn 11450 reducer corresponds to the opening of 2 inches on your vacuum. Plug in the vacuum brand hose to the vacuum and the other end into one of these fittings to power the dust collection system. (See illustration. The larger diameter of the reducer corresponds to the larger diameter of our standard dust collection hose, allowing it to function as a regular reducer. Typically, these fittings are used to transition from a larger main line to a smaller branch line. This step-down increases air velocity in the vicinity of the machine, which is where it is most needed. This reducer is designed to connect to a standard 4 inch dust collection hose and should be secured with a hose clamp to prevent it from being accidentally disconnected.
DOES NOT FIT ANYTHING ELSE BUT A 4″ OR A 2″ RING!
