This is the size you need unless you are working with lines larger than 5/8″. These clamps work with every size of indoor and outdoor flexible tubing we sell and the price is right! FITS 1/4″, 3/8″ 1/2″ and 5/8″ as well as the less common sizes in between. For our Metric customers these clamps fit any tubing 6mm to 16mm.
These clamps are very easy to use. You will need a 1/4″ nut driver or simple flat slotted screw driver to tighten them. The nut driver works a lot better. Slip the clamp on the hose. Push the hose on the barb. Slide the clamp up the hose until it overlaps the barb. Tighten until just snug then 1/4 turn. Do not overtighten.