Sealey tyre pressure gauge digital with swivel head quick release sealey tst pg98 push on type tyre pressure gauges with 8mm digit lcd display calibrated in psi pressure release valve single lithium cell will run approximately 4000 test cycles auto off function with low battery indication available as either swivel head rigid model no tst pg98 or flexible leader hose model no tst pg981 both with push on chuck sealey tst pg98 tyre pressure gauge digital with swivel head and quick