TONKIN REPLICAS DIECAST SCALE MODELS 1/53 (O SCALE) PRECISION AND STANDARD TRACTOR TRAILERS-20% LARGER THAN 1/64 SCALE WITH MAJOR DETAIL. THE TONKIN PRECISION SERIES REPLICAS HAVE SUPER DETAILED FEATURES INCLUDING DETAILED SLEEPERS, DETAILED ENGINES, AIR HOSES, OPENING DETAILED BATTERY BOXES AND MORE.