Specifications Glass block  1.the certification: CE and ISO  2. Pattern:clear, mist, meteor, parallel, crystal parallel, lattice, rhombus, double star, frost bistar, sea wave, water bubble, diamond, oblique line, cycle rhombus, well shape, mosaic, ice shadow, rain, phoenix tail, digona, meshy, coral, nautilus, alpha Specification (mm) Packing (pcs/ctn) Dimension (cm) Unit weight(kg) Capacity/20’without pallet Capacity/20’ with pallet 190*190*80 6 39.5*26*20 2.3 9000pcs 7200 pcs 190*190*95 6 39.5*30*20.5 2.5 7500 pcs      4800 pcs 145*145*95 8 42*30.5*16 1.7 11200 pcs 8960 pcs 145*145*80 10 43*30*16 1.5 12500 pcs 10400 pcs   3.The following information is based on a typical 190x190x80mm clear glass block.  Glass Composition : Silica-sand, soda ash, calcium. Fusion is obtained at approximately 1550OC.  Light Transmission Clear 190x190x80 = 80% Coloured 190x190x80 = 60%  Thermal Transmission Average value = 2.9 W/m² °C : Single Wall.  Impact Strength 12.0 N/mm - Tested using 50kg sand bag and steel ball bearings.  Sound Transmissions Rw = 42dB depending on frequency.