14 extends from one end of semicircular tube holding portion 12 and is generally straight albeit having a triangular configuration as arm 14 extends towards its distal end 14 c the first arm 14 as illustrated can be provided with ribs 14 a on its outside surface for a user to contact clamp 10 arm 14 is also provided with a triangular inner body 14 b which adds rigidity to first arm 14 a second curved arm 16 extends from the opposing end of semicircular tube holding portion 12 curved arm 16 curves back towards first arm 14 and terminates at a catch 18 having an edge 18 a extending inward towards tube holding portion 12 edge 18 a can be snap fitted over distal tip 14 c of first arm 14 to close clamps 10 a and 10 b after the interlocked clamps have been separated from each other curved arm 16 like tube holding portion 12 defines an aperture not seen in its wall to allow a tube 102 104 to pass through clamp 10 as seen in fig1 and 3 located between u shaped holding portion 12 and first arm 14 is a first clamping jaw 20 a located between holding portion 12.