Originally named "the Plastic Paint Paddle Company, Harbor Plastics Mfg., Co. was established in 1970 with a single press in a small industrial park by Wesley Seapy to manufacture plastic paint paddles that sold by mail order around the United States and Canada.  Not being able to sustain the company on that single produt, Wes went into custom injection molding to keep his machine busy. In 1988, Harbor had out-grown it’s original building and moved into a 10,000 sq ft World War II era Quonset hut where it expanded to six injection molding machines.  In 1996 Harbor expanded this facility adding office, assembly, warehousing, and tooling. 1998 saw Harbor expand again bringing the total size of its California facility to nearly 25,000 sq ft with 12 injection molding machines.

In 2000, Harbor could no-longer contain it’s growth within this newly expanded facility and so purchased Valley Precision Plastics in Phoenix, Arizona.  Since then, Valley Precision has grown approximately 30% and continues to serve the Automotive and Industrial industries.