About Us McLeish / Corr-A-Box is a quality manufacturer with: State of the art equipment to deliver quality products through our three converting plants and close association with three other converting plants within southern Ontario Two Corrugators in the Greater Toronto Area Guaranteed and consistent supply of raw material Long-term experienced and innovative staff McLeish / Corr-A-Box maintains its high growth rate through understanding the needs of our customers, focusing on the cost reduction and efficiencies for customers and insisting on the highest level of service. Through these practices we remain a leader in reliability and innovation in the industry.