Industrial UPVC Concentric Pipe Reducer Coupling 4mm to 8mm (ID)

# Industrial UPVC Concentric Pipe Reducer Coupling 4mm to 8mm (ID) Precision industrial concentric pipe reducer coupling designed for 3D printing. Modeled according to heavy-duty UPVC plumbing, pneumatic, and dust extraction standards. Features a smooth internal conical transition ensuring laminar fluid and airflow without turbulence or backpressure. --- ### Dimensional Specifications: * **Small Port Inner Diameter (ID1):** `4mm` (Wall: `2.0mm`, OD: `8.0mm`) * **Large Port Inner Diameter (ID2):…

♥ 0