Replacement suspension Head Protection Suspension Type Ratchet (6-Point) Fits Hat Size 6 1/2 to 8 For Use With Skullerz Safety Helmet Compatible Hard Hat/Helmet Brand Name SKULLERZ BY ERGODYNE Compatible Hard Hat/Helmet Grainger Part Number 785U17 785U18 785U19 785U20 785U21 785U22 785U23 785U24 Compatible Hard Hat/Helmet Manufacturer Part Number 8974 8974LED 8975 8975LED