smooth blue on white dual lor 3 layer HDPE panel for swing Plastic HDPE Pipe - Pacific rrugated Pipe mpanySPECIFICATIONS. AASHTO M252: Standard Specification for rrugated Polyethylene Drainage Pipe: 3″ – 10″ (76.2mm – 254.0mm) AASHT Email: vicky@chinaupe.com Whatsapp: 8619937131062 Chat Now