RATHER THAN BUY A LARGE BOX OF FLEX-TUBE TO FINISH THAT "LAST LEG" OF YOUR DUST-COLLECTION SYSTEM (AND THEN HAVE A TON OF TUBING LEFT OVER) THIS ALLOWS YOU TO SPLICE TOGETHER ALL OF YOUR HOSE SCRAPS THAT ARE TOO SMALL TO FINISH THE JOB, ENDING UP WITH A PIECE THAT WORKS.