Allstar Performance Brake Pressure Gauge Adapter - For GM Metric Caliper Maglock The Perimeter Seal system is

The Perimeter Seal system is the latest technology from Racing Optics which allows for a tighter seal to visor

150 PSI peak pressure

Blue or White

and (2) high-flow -3 ORB to -4AN fittings

Elastic cuff opening for ease and secure fit

Allstar Performance Brake Pressure Gauge Adapter - For GM Metric Caliper Maglock The Perimeter Seal system isGauge temporarily replaces the bleeder screw in most aftermarket brake calipers with 1 4" 28 thread bleeder screws to measure brake pressure. Swivel head positions the 2 3 4" diameter gauge for easy viewing. Convenient remote bleeder can be used to evacuate air in the system for accurate readings. Specialty items for the Shop, Trailer and Track. The Allstar Performance brand offers thousands of hard to find, specialty items that cover many segments in