CFR Carbon Film Resistors YAGEO CFR Carbon Film Resistors feature a power rating range of 1/6W to 3W and a resistance tolerance range of ±2% to ±5%. The CFR Resistors are manufactured by coating a homogeneous film of pure carbon on high-grade ceramic rods. After a helical groove has been cut in the resistive layer, tinned connecting leads of electrolytic copper are welded to the end-caps. The YAGEO CFR resistors are coated with layers of tan color lacquer.