Manual Adjust Speaker Pole with M20 Threaded Lower End, 38mm Pole & 35mm. The JBLPOLE-MA features an amazing height adjustment collar that features an ergonomic "Z" knob that provides comfortable adjustment. The strongest fitting made, the height adjustment collar prevents over- tightening and breakage issues associated with all plastic designs.

The JBLPOLE-MA features an amazing height adjustment collar that features an ergonomic “Z” knob that provides comfortable adjustment. The strongest fitting made, the height adjustment collar prevents overtightening and breakage issues associated with all plastic designs. Plus, the die-cast zinc fitting is 30x stronger than ABS or Nylon plastic used by the competition. Fits all JBL EON, PRX, STX, VRX and SRX818 subwoofers.