Hard Hat Suspension Head Protection Suspension Type Ratchet (4-Point) Fits Hat Size One Size Fits Most For Use With Comfo-Cap(R) Skullgard(R) Medium Size Compatible Hard Hat/Helmet Brand Name MSA SAFETY Compatible Hard Hat/Helmet Grainger Part Number 43FD40 4LN81 4MD41 4MD42 4MD46 4MD47 5KAX0 Compatible Hard Hat/Helmet Manufacturer Part Number 475395 475396 475397 475405 475407 475408 482002