You are welcomed to come to our factory to buy the latest selling, low price, and high-quality Pengfa Galvanized Seamless Steel Pipe. Small diameter optional thread buckle, sleeve tight type; Large diameter optional socket expansion, clamp connection.Hot-dip galvanized conduit:mplement the standard GB/T20041.21-2017 standard, in line with the national fire safety requirements, suitable for embedded and ceiling open installation.