Klos Kaulk caulking nozzles extend the reach of a normal caulk tube and provide a permanent curve to make applying caulking easier around bathroom fixtures, tight spots and other hard to reach places. Purchase includes one Klos Kaulk reusable holder and 6 disposable tubes. Klose Kaulk threads onto any 10 oz or 29 oz tube of caulk and is reusable.