4.5kg of rich Blue tempered glass chips. This glass is specially manufactured to tolerate high temperatures so it wont spit or shatter. This make it suitable for use in gas fires, firepits, ethanol burners and other living flame fires. Chips range from 1cm to 2cm in length and their shape means they sparkle in the flame of a fire giving a warm glow. They work well on their own or look great with our Firebrand Direct logs especially our white birch log sets.