Precision machined from high grade brass & covered by shielding aluminum shroud, & special tools are needed to apply/remove Novent caps. All caps are embossed & color-coded. Proper installation helps stop accidental refrigerant mixing in A/C systems.

-Resists crushing & removal without key
-Corrosion resistant anodized aluminum
-Integral neoprene O-ring resists oils & sealants
-Torque limiter prevents overtightening