... 2.energy-saving 3.Amenity,safety 4.maintenance free Sea Wave Glass Block Glass block details: 1. Specification: 190* ... , crystal parallel, lattice, rhombus, double star, frost bistar, sea wave, water bubble, diamond, oblique line, cycle rhombus, well shape, mosaic ... mm - Tested using 50kg sand bag and steel ball bearings. Sound Transmissions RW = 42dB depending on frequency. Specification(mm) Packing ...