Hard Hat Suspension, Head Protection Suspension Type Pinlock (4-Point), Fits Hat Size 6-1/2 to 8, For Use With V-Gard(R), Compatible Hard Hat/Helmet Brand Name MSA SAFETY, Compatible Hard Hat/Helmet Grainger Part Number 10E656, 22EY73, 22EY74, 22EY75, 22EY79, 22EY80, 22EY81, 22EY82, 22EY83, 22EY85, 22EY86, 22EY87, 22EY88, 22EY89, 38ZL94, 38ZM05, 3PUP8, 3PUP9, 3RRL2, 3RRL3, 3RRL4, 3RRL5, 3RRT2, 3RRT3, 4LN68, 4LN76, 4LN83, 4LN85, 4LN94, 4LP02, 4MD02, 8UWM3, 9D111, 9FLG7