Roebic Laboratories K-67 Granular Concentrate Drain and Trap Cleaner, 16-Ounce From the Manufacturer For just pennies a month, K-67 eliminates slow and sluggish drains in your home by removing layers of build-up in the trap and along the entire length of pipe. K-67 works through bacterial and enzymatic action. It is non-corrosive and will not damage pipes or burn skin. Features Keeps pipes and traps clear and clean Safe for use in all plumbing Use monthly Certified biodegradable Easy to use USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.