Always be known as the pizza places that delivers the hottest pizzas in town. The CookTek PFPD001 FlashPak Disc is designed to is designed to work with the CookTek's Pizza Delivery System (NOT INCLUDED). The Disc is used inside the VaporVent Pizza Delivery Bag (NOT INCLUDED) to heat up to over 145 F for up 45 minutes. Discs are constructed of TSA metal encased in "phase change" plastic that keeps the heat lasting longer. Energy is absorbed, stored and released slowly to keep pizzas hot during the delivery. Heating up from completely cold will take up a minute to heat a bag and re-charge times will be in seconds. - Black - Metal/Plastic - Fits 16" & 18" - Sold per each