Phenolic Resin manufacturer / supplier in China, offering Hollow Glass Microspheres with Low Density of 0.15-0.6g/Cm ³ and High Strength of 5000-18000psi Are Used as Insulation and Lightweight Fillers for Composit, "Hollow Glass Microspheres for Lightweight Composites", Multi-Person Purchasing High Purity Calcined Alumina Powder Hot Pressed Refractory Material and so on.