These screw down clips effectively block off air/gas flow by pinching together the sides of the tube. 
A nickel plated steel, with projection plate to prevent damage to tubing by end of screw, with hinged bottom bar for direct fitting and removal without access to ends of tube.

Projection plate prevents end of screw from damaging tubing.
Hinged bottom bar allows clip to be fitted and removed without access to ends of tube.

Science Lab Supplies is a leading Hoffman Clips manufacturers, suppliers and exporters that offers wide range of Hoffman Clips at most competitive prices.

Hoffman Clips

SKU: SL-210