Mastercool 85211-R Blue Low Side Replacement Knob for AC Manifold Gauge

The Mastercool 85211-R is a revised design replacement knob for the low side (blue) valve on Mastercool manifold gauge sets. This genuine OEM replacement part ensures proper operation and control of your AC manifold gauges.

Key Features:

• Revised design for improved durability and performance
• Blue color coding for easy low side identification
• Direct OEM replacement for Mastercool manifold gauge sets
• Precision-engineered for smooth valve operation
• Single knob pack

This replacement knob is designed to fit Mastercool manifold gauge sets, providing technicians with a reliable replacement component to maintain their HVAC/R service equipment. The blue color follows industry-standard color coding for low pressure refrigerant connections.