the pressurized air will not escape from the connection between coupler 130 and tube 111 each of tubes 111 has a predetermined length such that couplers 130 are spaced apart at longitudinal positions which accommodate the locations of the chambers 341 342 343 344 in sleeve 310 in a preferred embodiment shown in fig2 conduit 110 is divided at second end 115b into four separate longitudinally spaced ends which are secured to four couplers 130 corresponding to each of the four tubes 111 in operation couplers 130 are releasably attached to corresponding sleeve fittings 223 in chambers 341 342 343 344 to define pneumatic passageways for interconnecting controller 10 and sleeve 310 each coupler 130 includes printed indicia 133 on the body 135 of the coupler which corresponds to like printed indicia on sleeve fittings 223 in chambers 341 342 343 344 thus when couplers 130 are properly connected to corresponding sleeve fittings 223 in chambers 341 342 343 344 a continuous pneumatic passageway is formed for interconnecting controller 10 and sleeve 310 to accomplish the objectives of the compression system in one embodiment printed indicia 133 and the like indicia on sleeve fittings 223 are predetermined colors such that couplers 130 and sleeve fittings 223 in chambers 341 342 343 344 are color coded an alternative embodiment may have the entire coupler and sleeve fitting 223 color coded a grip portion 140 shown also in fig5 and 6 is positioned adjacent first end 115a of the conduit 110 for aligning fittings 120 with outlet ports 17 of controller 10 grip portion 140 includes a housing 141 formed by top body section 143a and bottom body section 143b body sections 143a and 143b are preferably molded of a suitable plastic but may be formed by any means.