https://www.es-forum.com/is-electronic-rife-device-magnetic-pulser-bad-for-EMF-tp4022901p4022923.html
I didn't checked the web site as I assumed it is the same seller on EBay; great you checked it, I contacted them asking them to provide me info of their company. I did come across a no of online web sites which gives no contact address or tel no & I did buy things from them; I am not very careful sometimes. On the other hand, from time to time I heard from TV news some convincing web sites with proper address & tel no have turned out to be fraud, taking money & not sending the products!
If the shipping cost of 1 or 2 rollers is not expensive to; I may take a risk to buy from that site & pay by PayPal.
But of course the safer way (but with higher price) is to buy from ebay seller soda173