a. our products are made strictly according to ASTM A888 standard.
b. size: range from 1.5'' to 12'', with 3.048m/pc.
c. painting: black bitumen paint both inside and outside.
d. delivery time: 15-30 days, depend on your quantity.
e. certificate: UPC certificate.
f. application: used for construction drainage,
g. payment term: T/T, L/C, or D/P.
h. minimum order: 1X40'GP.
I. Features: Flat and straight; High strength and density without defect; Easy to install and maintain; Long lifetime, fireproof and low noise rate.