Dear Sir Madam, Type:Semi-Trailer Material:Steel Certification:SGS, ISO,CCC End plate:Q235A 6mm Tank Body:Q235 5mm Axle:FUWA BPW brand Manhole cover:500mm manhole cover King pin:50# 90# Tire:12R22.5 Compartment:1 2 3 4 5 6 7 Bottom valve:1-2sets of bottom valve Suspension:Mechanical suspension or Air bag Painting:Sand blasting,Anti Corrosive primer