Nice models, well detailed. Come with a pre installed load which looks well. Only issue I have is that I cannot shunt these with the "A" class diesel also from IRM. The reason being that the couplings on the "A" are slightly lower than the couplings on these wagons so that when being shunted the coupling of the "A" class goes below the coupling on the ballast wagon and lifts it off the rail. Shunts fine with a Murphy Models 121 loco so just bear this in mind if these are on your wish list. Bit of a lapse in design as far as IRM and the couplings on different items of rolling stock are concerned,