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Wire

Primary GPT (General Purpose Thermoplastic Insulated)  Wire goes by many names including primary electrical, gpt, hook-up, gpt automotive, automotive primary, auto electric, primary and GPT hook up. By whatever name, it is recommended for general purpose wiring of trucks, tractors, trailers, cars, boats, buses, RVs, motorcycles and other surface vehicle motor driven equipment. Primary electrical wire is also used in car audio electronics and low voltage manufacturing.

Speaker wire is used to make the electrical connection between loudspeakers and audio amplifiers. Modern speaker wire consists of two electrical conductors individually insulated by a thermoplastic such as PVC. The two wires are electrically identical, but are marked with a polarity strip for easy circuit identification.

Heavy duty battery cable is available in either pre-measured lengths, or by the spool.  Available in either red or black, and in sizes from 6 gauge up to 4/0 gauge.  Manufactured to S.A.E. specification J-1127.