... no matter it is mill finish, stucco or tread plate (in other name, checker plate, checkered plate, chquer plate, chquered plate, ... no matter it is mill finish, stucco or tread plate (in other name, checker plate, checkered plate, chquer plate, chquered plate, ... grade aluminium from leading manufacturers of aluminium sheet for use in the road sign industry. ALSPEC also carries complementary extrusions ...