PPU-FLUO-01 Dimensions: Approximately 13.5 x 6.5cm Weight: Approximately 100g Set of "Fluorite" water purification stones delivered in a metal box. Composition: Fluorite Fluorite symbolizes order; it is considered a good learning stone. Weight approximately 100g Delivered with a mini user guide in 4 languages (French, English, German, and Spanish) The water purification stones are carefully handled and cleaned. The tumbling process removes all sharp edges and loose chips. The stones are smooth and will not scratch your glass when used properly. Each set is delivered in attractive packaging, size approximately 6.5 x 13x5 cm.