1 trailer turntable : for tractors. 2 material: nodular cast iron 3 color: Available in various colors Rixin turnplate factory can supply different Trailer Steering Wheel for Semi-trailers and fully trailers and tractors.we have produced the turntables for more than 20 years.We supply UA ,UB ,UT type turntables and ZA,ZB type turntables(Trailer turntable, single track turntable, double track ...