Samsung isn’t taking any more chances with the Note 7.

The South Korean company, which recently ended production of its troubled Note 7 flagship smartphone, is reportedly sending out fire-proof boxes to house the recalled devices.

The return kits, which Reuters reported are being distributed to customers who purchased the Note 7 on Samsung’s website, come with detailed instructions, an insulated box and gloves for handling the device. The return box comes also includes an exterior disclaimer that the package contains a “Damaged/Defective Lithium Ion Battery” and is “forbidden for transport by aircraft,” according to a YouTube video from XDA Developers.

FedEx, the United States Postal Service and UPS all confirmed to Reuters the phones would not be shipped via aircraft. FedEx additionally said it would pick up the defective devices from retailers only, not from individuals.

The news comes on the heels of Samsung’s announcement that it has permanently ceased production of the Note 7 in the wake of back-to-back recalls of the device due to an overheating battery issue. The U.S. Consumer Product Safety Commission on Thursday expanded its recall of the original device to now include replacement Note 7 phones that were issued as well.

Beginning on Thursday, Samsung said it would offer a Note 7 Refund and Exchange program to U.S. customers that includes up to a $100 total bill credit for customers who exchange the Note 7 for any Samsung smartphone or up to a $25 total bill credit for customers who exchange the Note 7 for refund or other branded smartphone.