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Roncelli Plastics, Inc.

330 W. Duarte Rd.
Monrovia, CA 91016
United States

Since the doors opened in 1969, Roncelli Plastics’ mission has been to provide exceptional customer service alongside precision production of plastic components in critical industries. Over the years Roncelli Plastics has expanded on pace with our trusted partners, providing support for organizations ranging from fortune 100 corporations, to early stage hyper growth startups.

Committed to investing in the most efficient manufacturing technologies and outstanding people, Roncelli Plastics empowers an atmosphere of accountability, reliability, and dependability, where open communication and teamwork translates to customer success. Roncelli Plastics' diverse team of experienced engineers, machinists, inspectors, supervisors, and managers are dedicated to the pursuit of Roncelli Plastics' core values:

Safety First, Always

Great Origination, Seamless Handoffs, and Zero Defects

Accountability, Responsibility, and Extreme Ownership

Continuous Improvement

Respectful, Professional, Friendly, and Open Door Culture

Excellent Service Through Integrity and Open and Honest Communication