Wrench, Open-ended, 14mm x 14mm Back Catalog number: CTS-21742 Availability: In the manufacturer's stock Price on request - + Recommended CTS-21523 O-ring, Viton™ (5.13 ID X 1.77W) Price on request 11-4101 Passive Inlet Valve Price on request CTS-21628 Peristaltic Pump Tube Kit, 2G Price on request