K-Tek Poles tops feature two sets of slots to accommodate most types of mic. cables. Telescoping sections are connected with unique captive collets that require minimum torque. The collets are held captive within a collar studded with directional dimples. The dimples are designed to limit grip in the tightening direction and increase grip in the loosening direction. The bottom coupling allows boom operators to attach a variety of accessories. An attachable base section with internal 48v Phantom or 12v "T" power supplies let the sound person use a radio mic. transmitter at the boom. A flow-through accessory allows an internal cable to exit without chafing. K-Tek's proprietary Mushroom Pole Base is molded from rugged polyurethane for optimum shock protection and long life. K-TEK'S ADVANCED BOOM POLES offer an exceptional combination of thoughtful design, top-of-the-line materials, and precision engineering. K-Tek Boom Poles are available in (6) sizes. Sections: K-251 have 5 sectionsSize: K-251 Minimum length 4' 7", Maximun Length 20' 11"Accessories: (option)K-251FT (K-251 + K-FT) Factory wired with straight cable and male & female XLRs. The K-FT is a flow through foot has a slot four inches long to allow long cables to flow smoothly. It should be use with the K-Tek K-202 and K-251 and may be practical on a K-152 as well.