... C-Fire retardant grade4. D-Fast Cycling GradeE. P. S. (Expandable Poly Styrene) is a lightweight, rigid, plastic ... granule≥ 90%≥ 90%Limit oxygen index/≥ 30 FLAME RETARDANT F grades -for panel applications, housing, and constructions. Heat ... and oxygen index. Oxygen index is above 30.F-MS(F-103)1.2-1.6 mmHeavy duty block ... mmHigh density application13.3 ~ 16.7 g/lF-S(F-106)0.4-0.7 mmContour cutting15.4 ~ ...