Diamondium Grade ASuperior Heat Retention and Distribution , High Purity Material; Clear and Uniform Appearance, Enhanced Flavor and Vapor ProductionClick HereDiamondium Grade BHigh thermal conductivity next to diamond, Greatly increase vapor volume, Excellent heat retentionClick HereDiamondium Grade D High thermal conductivity next to diamond Greatly increase vapor volume Durable,Clean,Mirror PolishedClick Here
