Designed for a lifetime of flexibility, the Flex track arm is the perfect piece to be combined with other Flex modular seating when it's time to expand or change up your style. Sold as a pair of arms, the five inch width provides a modest space for resting your arm while providing a modest profile. And adding them to your existing Flex seats is a breeze with a patented J-Bracket™ "no-tool" method that takes seconds to assemble.