AquaticLife Buddie Fit Press 1/4" x&nbsp; MPT 1/8" Elbow Check Valve w/Blue Clips (2-pack) Buddie Fit Press 1/4" x MPT 1/8" Elbow Check Valve w/ 1 Blue Clips Easily plumb RO water systems with press-fit connectors Once tubing is inserted into the connector, use the included blue collars to lock the connector so tubing cannot be removed 2 Pack