Many small sellers dealing in craftsman products follow the "1/3 business model." That is: 1/3 is cost of goods, 1/3 is overhead, 1/3 is salaries. So s 25% tariff would be at a minimum an 8.3% increase in price to the purchaser. Scott is a good person so he's not going to pass a 25% price increase as some might.
As to what is on the tariff list you will find railroad equipment and electronic components and boards (think ERR). By the way, that 1:1 equipment.
Jan