Haomei 4mm aluminium checker plate for caravans is of 4mm thick, 100mm to 1850mm wide. Grades for caravans aluminium alloy chequer plates include 1100, 1060, 3003, 5052, 5754, 6061, 6063 and 6082. Patterns cover 5 bar, diamond, 1 bar, 3 bar etc, among which 5 bar and 1 bar are the most popular. The quality of aluminium checker plates varies …