Instruction: Answer the given question using the supporting document.

Input:
Question: What type of metal are the trays made of?
Document: So far I'm really loving this thing. Who knows, maybe it will go the way of the bread maker and juicer, but for now it is awesome. I've only made beef jerky thus far, although as I type this I am dehydrating some red peppers and then I plan on making some kale chips, so I don't have vast experience. But I have made 4 batches of jerky and it is so simple...and cheap.
Bought this and some additional trays to dry out my pepper harvest. Drying every type of pepper you can imagine which put out a awful smell when you dry them. This guy drys them out completely in 24 hrs dry enough to grind and not have to worry about spoilage. Much much better then trying to oven dry or sun dry.
This product stopped working in the first year. Thankfully it was still under warranty and the unit was replaced but I lost 7 trays of food because of the breakdown and had to pay shipping costs. I do use this frequently, especially with seasonal foods and it does dehydrate well. I will continue to use this until it stops working but I do not plan on purchasing this type or brand for a replacement.
This is a great dehydrator. It works very well and the temp control on top makes it very useful for many different type of food. While they claim the trays do not need to be rotated, I find that trays towards the top tend to dry a bit faster then trays toward the bottom. Generally when making fruit leather I will just rotate the trays top to bottom after 6-8 hours which makes everything end up taking about the same time.
The fruit takes longer on the solid trays(about 1.5 - 2 hrs) but it's a LOT more fruit on that one tray. I used a metal spatula to loosen the fruit leather and it peeled up in large chunks.I bought extra solid fruit leather inserts for my trays. It took two trays to do what I was doing in 7 trays with the parchment paper. I did twice as much fruit puree (4 trays) and it took almost 9 hrs instead of only 6 - 7.
It is illegal to resell or attempt to resell a recalled consumer product.Name of Product: NESCO American Harvest Gardenmaster Food DehydratorUnits: About 4,800Manufacturer: The Metal Ware Corporation, of Two Rivers, Wisc.Hazard: A defective capacitor in the electronic control module can overheat, posing a smoke and fire hazard.Incidents/Injuries: NESCO received three reports of overheating resulting in smoke or fire. No injuries have been reported.Description: The recalled product includes a base with stackable trays to place food.
This dehydrator works just as described. I do not have the experience with this type of appliance to make a comparison, but it seems to do the trick~
Jerky, fruit, it's all perfect. The dial temps that are labelled for which type of food you are dehydrating is handy! Had it for 6 months now
Have had more jerky in the past 8 months than in the previous ten years! Works great - very satisfied - another batch going as I type....
Doesn't have an on/off switch or timer, but works like a charm. I only wish they sent enough of each type of tray cover for every tray as I do a lot at once.
Answer: I called the company, they are made of bpa free plastic.