SparkPlugs Metal Detectable Foam Earplugs, Foam, Metal Detectable with Cord ORS NASCO Compressible Graf Tite® high pressure seats withstand Compressible Graf Tite® high pressure seats withstand high temperatures and extend tip life In tip mix resists flashbacks for maximum efficiency Full swaging minimizes gas turbulence Concave tip end reduces backfire and resists flameout when base metal is accidentally contacted during cutting For hand use under conditions of extreme pressure and temperature and seals gently and snugly without pressure fun colors provide easy compliance checks Metal detectable for food processing applications The ball bearing and cord are in separate holes so that the ear plugs remain detectable even if the cord is removed The ear plugs are corded to prevent ear plug loss Their tapered shape fits easily in the ear canal