Hollow Structure Artificial Stone Duration 1 year Category:Chemical Filling HOLLOW GLASS MICROSPHERES is a kind of ultra-lightweight inorganic non-metallic material with hollow structure, and it is a versatile and high-performance new lightweight material developed in recent years.Its true density is 0.15-0.60g/cm3 with 2-120μ M in diameter.Features: With light weight, large bulky, low thermal ...