Well known in our collection. A beautiful Jumbo Air horn set, round model. This set contains two horns, each 66mm long, Inclusive two front covers and Jumbo Transfers. This set also contains two horns, each 52mm long, Inclusive two front covers and Jumbo Transfers. To point out the corresponding mounting-pin positions on the truck model roof, we have included a drill template as well. This Air horn set is finished in high quality chrome. We do guarantee a long lasting shine surface. This product is the perfect choice to provide your truck that specific 18 wheeler touch