About this item EASY TO USE: It doesn’t get easier than this! Simply follow the instructions found on the box or in the complementary instruction card (Pictured above) and ENJOY your Charcoal Disks! SLOW BURNING: Red Ruby boasts a 45 minute slow burning time. QUICK-LIGHTING: All you need to do is hold it over an open flame for a couple of seconds then sit back and enjoy! Each order, be it 30mm or 40mm, comes with 100 charcoal disks. That means you receive 75 HOURS of burn time per order!