![PTM Watersports KNB - 050 Replacement Knob - Black [P12848-36 BK]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/ptm-watersports-knb-050-replacement-knob-black-p12848-36-bk.webp)
KNB – 050 Replacement Knob – Black
The KNB-050 ABS knob with a 3/8″ collar and a threaded brass connecting insert is the black replacement knob for the popular VR-140 Pro and PXR mirror systems.
Available in Midnight Black only.
*Sold as an Individual
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![PTM Watersports EXT - 400 Extender - Black [P13020-100 BK]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/ptm-watersports-ext-400-extender-black-p13020-100-bk.webp)
![PTM Watersports KNB - 100 Replacement Knob - Black [P12682-58 BK]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/ptm-watersports-knb-100-replacement-knob-black-p12682-58-bk.webp)
![PTM Watersports Mirror Cover f/VR-140VX-140 Mirror [MS-140]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/ptm-watersports-mirror-cover-f-vr-140vx-140-mirror-ms-140.webp)
