Hermetically sealed, ideal for high corrosion resistance No metal-to-metal contact, ideal for cleanroom application Strong magnetic force Optional counterplate: Stainless Steel - MC-JM49, AS-68 Plastic Sealed - MC-JMP45WARNING: This product can expose you to chemicals including Formaldehyde, which is known to the State of California to cause cancer. For more information go to www.P65WARNINGs.ca.gov.