Hellermanntyton flexible cable support heladuct flex hellermann tyton 164 21108 the hellermanntyton 164 21108 htc 20sk is a flex cable support from the heladuct flex series the cable support is a space saving wiring system which holds the routed cable clearly open to view cables can be routed in or out over the whole length of the supportthe support can be rapidly mounted to a surface with the adhesive strip the high quality foam bonding layer smooths over irregularities in the underlyin