WALTER 58A507 ~ Coolcut 400 U 20L Color_BlueYellow The 3M E A Rfit Dual Ear Microphone mix filter and spray The 3M E A Rfit Dual Ear Microphone Assembly works with the 3M E A Rfit Dual Ear Validation System to help employers determine whether workers are receiving adequate hearing protection from their hearing protector 3M Speedglas Sound Dampening Breathing Tube SG 50W is a replacement sound dampening breathing tube for 3M Adflo Powered Air Purifying Respirators when used with 3M Speedglas Welding Helmet 9100 MP enhanced coolant life COOLCUT 400 U is a water miscible coolant for metal cutting processes on individual machine tools as well as on centralized systems