HQRP® 4-Inch Y-Fitting Dust Collection Hose Connector; Three 4-Inch nominal ends measure 3-61/64-Inch O.D. and 3-3/4-Inch I.D.;. The Y-Fitting is Used to Design a Main Line and Branch Line Dust Collection System to Service Each Machine;. Tough, Durable ABS Plastic Material; Simple and Quick to Install; Attach Hoses With Hose Clamps;.
