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Product Features:
High Quality foam for Conference Microphone for David Clark, Avcomm ,light speed Head set Protect your microphone against wind interference and singers' spit. Inner diameter:1 cm *4cm ( about 0.4 "x 1.5") Outer diameter:2.5 cm *4.5 cm ( about 0.9 "x 1.8") 1 pcs with 1 pcs "O" ring and free ship cost international