Can you use permanent stamp to mail tonis

I think there may be a bit of confusion here!

A "tonis" is not a standard unit of measurement or a type of mailpiece, so I'm assuming you meant to ask about mailing "toner" (a type of printer ink or toner cartridge) or "tons" (a large quantity of something).

To answer your question:

• If you're referring to mailing toner cartridges, you can use a permanent stamp to mail them, but you'll need to ensure they meet the USPS (United States Postal Service) regulations for shipping hazardous materials. Toner cartridges contain toner powder, which is considered a hazardous material. You'll need to follow specific guidelines for packaging, labeling, and shipping these items.
• If you're referring to mailing a large quantity of something (e.g., a "ton" of paper), you'll need to use a commercial shipping service or a freight carrier, as the USPS has weight and size limits for mailpieces. You'll also need to ensure that the items are properly packaged and labeled for shipping.

In general, it's always a good idea to check with the USPS or a commercial shipping service for specific guidelines and regulations on shipping items, especially if they're hazardous or oversized.