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RM504 (NEMA G-3) is a thermoset rolled and molded composite consisting of a medium- weave glass reinforcement combined with a phenolic resin system.

NP510A (NEMA FR-4) combines a woven glass fabric and an epoxy resin laminate (T_g approximately 130°C) that contains bromine.

NP130HF (NEMA FR-4) is a glass fabric epoxy composite that is a lower resin content version of NP130.

NP130 (NEMA FR-4) consists of a woven glass fabric substrate combined with a halogenated epoxy resin system.