The QR2 series is Aventics' larger-format push-in fitting line for higher-flow pneumatic connections, complementing the QR1 range with tubing capacity from 12 mm through 22 mm OD. Straights, elbows, tees, branch tees, and bulkheads pair with NPT, BSPP, and metric thread ports for plant air, machine pneumatic, and higher-flow circuit plumbing. Nickel-plated brass construction provides corrosion resistance and tool-free service for industrial maintenance environments.