... WE USE ? UPR unsaturated polyester rein MATERIAL FRATURE1)CLEAR TRANSPARENT2)LOW DENSITY, NOT SO HEAVY BUT STRONG3 ... (unsaturated polyester resin)/ Acrylic / CrystalProduct Bathroom accessories,Paperweight,hourglass,trophy,dice,ball ect.Usage souvenir ,promotional gift ... ,home decoration ,paperweight etc ColorTransparent or any color Logo Silk screen print / Grave /LaserShape Cube,round, polygon,any ...