FS19 J&M Speedtender 250&450 ST v18.104.22.168
Here are the J&M speed tenders. You will need to download the probox as well and use that one for the speed tender. They are not refillable. When you put the pallets on the tender it will empty them out. They are a pain to get into place so be patient with it and strap them down as you put them on there.