General Info

Shamrock has been one hundred percent woman,owned since 1986 by Mary Cay Westphal. Shamrock Plastics is a business dedicated to the highest standards of honesty and integrity. We have distinguished ourselves as top in the industry by our performance, namely: on time delivery in the 99% range; and a quality rating for defects per 1000 parts in the range of two one-hundredths of one percent.