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Up for sale one piece 39.5mm (1.555") skeleton:black aluminous， woofer / Bass speaker Drive voice coil

Internal diameter:39.5mm( 1.555" )

Total thickness:40mm (1.574")

Coil height:14.7mm(0.578")

Resistance:8 ohm

*Black aluminous is the best of high temperature resisting material

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