Siku 1972 Trailer for milk tanker. Scale: 1:50. The trailer is supplemented by the milk tanker truck offered under item number # 1939. Equipped with a matching design, the trailer offers even more flexible fun with the tanker, but also with a 1:50 series tractor. The valve of the pump box can be opened and offers a view of the pump and the flexible hose, which can be used rolled out.