DUST COLLECTION 2-1/4" TO 4" ENLARGER FITTING By Peachtree Woodworking - PW468 2-1/4" TO 4" Enlarger is made of flexible plastic. Accepts 4" hose on one end The other end plugs directly into a standard 2-1/4" Shop Vac opening. A hose clamp is required on the 4" end for proper connection. (Hose clamp sold separately) Shop Vac NOT INCLUDED