... block.Less air used Product name:expandable polystyrene(EPS)Grade : Fire Retardant ( Grade F 302) Particle size: 0.85---1. ... 45~65 Applications: Insulation, board stock and so onCharacteristic:Fire retardant B2, uniform size,low density of block,high foaming speed ... 45~65 Applications: Insulation, board stock and so onCharacteristic:Fire retardant B2, uniform size,low density of block,high foaming speed ...