With the Ruby Terp Pearl Set, you'll always have spare pearls that are clean and ready to go! Choose from two different sizes, each suitable to use with most banger types in different quantities. These accessories are designed to swirl around the banger as you inhale, ensuring a more even vaporization of your concentrates. Ruby is an especially desirable material since has an estimated 10 times the heat conductivity compared to quartz. Sold as a 10 piece set.