1.Plastic Connector 2.PU4/5/6/7/8/9/10/12/13/14/15/16 3.Union Straight Plastic ConnectorPU-union straight,PG-different dia union straight,PV-union elbow,PE-union tee,PE-union tee,PEG-different dia union tee,PY-union y,PW-different dia union y,PZA-cross,PK-prile,PKG-different dia tripe,PC-straight,PL-elbow,PB-tee,PD-branch tee,PX-branch y,PKB-branch triple,PC4*1/8,PL4*1/16 PU