Cylinder Ear Plugs, 29 dB Noise Reduction Rating NRR, Corded, M, Yellow, PK 200/ PART NAME ASSIGNED BY CONTROLLING AGENCY: PLUG EAR UNIVERSAL SIZE IN PLASTIC POUCH DISPOSABLE 200S SPECIAL FEATURES: DISPOSABLE; EA PAIR IN INDIVIDUALLY SEALED CONTAINER; VINYL FOAM REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS: LOW UNIT OF ISSUE NSN. CAGE 76381 AND PART NUMBER 312-1201 ONLY SELLS IN CS OF 2000EA. THIS NSN IS PURCHASED FROM DISTRIBUTORS IN UNIT OF ISSUE OF 200EA.