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