Technical Specification Item Hard Hat Suspension Head Protection Suspension Type Pinlock (4-Point) Fits Hat Size 6 to 7-1/8 For Use With V-Gard(R) Hard Hats Compatible Hard Hat/Helmet Brand Name MSA SAFETY Compatible Hard Hat/Helmet Part Number 10E656, 22EY79, 22EY80, 22EY81, 22EY82, 22EY83, 22EY85, 22EY86, 22EY87, 22EY88, 22EY89, 38ZL94, 3PUP8, 3PUP9, 4LN68, 4LN76, 4LN83, 4LN85, 4LN94, 4LP02, 4MD02, 5KAX4, 8UWM3, 9D111, 9FLG7 Compatible Hard Hat/Helmet Manufacturer Part Number 10155231, 458029, 460018, 461180, 463111, 463942, 463943, 463944, 463945, 463946, 463947, 463948, 464658, 464852, 466354, 466355, 466356, 473284, 473285, 474302, 475235, 476928, 478237, 484340, 488148, 488398, 489364, 815558 Number of Suspension Points 4 Suspension Adjustment Type Pinlock This listing is for each.