Can hook directly onto tube connection to faucet or snaps into brackets on 5 stage standard RO units. Check your reverse osmosis to confirm 3/8 tubing or 1/4 tubing. This filter has a 1/4 inch female thread. 

Pentek or Hydronix filters are equal in quality and both are NSF approved. Item shipped will be determined by available stock. Please contact us if you need more information regarding hookup fittings.