EK Waterblocks EK-TORQUE-CRING-6PK-STC-13-BL

EK-Quantum Torque Compression Ring 6-Pack STC 13 - Blue is a premium locking ring made for the EK-Quantum Torque STC 10/13 series fittings. It is not a stand-alone product, requiring an existing Torque fitting's barb.