Our Backer Channels are specifically designed for our Ultra Floor-To-Ceiling 1-Sided wine racking system (sold as a set). The Ultra Backer Channel supports the location of the connection between the two five-foot posts supplied at the time of purchase to ensure a sturdy support system for your wine display.
When creating a 2-sided wine floor-to-ceiling wine rack, the HZ Wall Rails support the location of the post connection, and a Ultra Backer Channel is not needed with these specific systems.