... 1.manufacturer,20years in this field 2.support OEM 3.certification:ISO9001,ISO14001 2.5-16.0MM LOW PRICE HDPE ... infiltration of water and oil, service life is up to 50 years, three or four times more than ... business many years ,so any request, feel free to contact with me, i will reply you soonest and ... the inquiry within 1 day, the buyer should pay 30% T/T in advance, and the balance should ...