Each SENSE Phunnel has a unique color and the edges are processed by hand. They have a semi porcelain surface and are fired at temperatures of 1100° C, thus being high-quality bowls that are extremely heat resistant. Materials: Clay Capacity: up to 18-22 g (depending on the type of tobacco) Diameter: approx. 75mm Color: Black / Blue manufacturer: SENSE Bowls, Russia This product is handmade. MADE IN RUSSIA