Replacement Suspension Head Protection Suspension Type Pinlock (4-Point) Fits Hat Size 6-1/2 to 8 For Use With Mfr No S51 S51MT S61 S62 S71 Compatible Hard Hat/Helmet Brand Name BULLARD Compatible Hard Hat/Helmet Grainger Part Number 8DK57 8DMC1 8DR32 8DR33 8DR34 8DR35 8PM31 8PM41 8RM24 8XF14 8ZE07 9CNL6 9CNL7 9DTJ8 9FAF2 9GEE0 9LE56 9W555