Tang Band W4-1320SJF 4″ Bamboo Fiber Full Range Speakers Drivers, 8 ohm
Cone / Diaphragm Material: Bamboo Fiber / Paper. 1- Open Box, never used, mint shape. Maximum Linear Excursion (Xmax): 3 mm. Surface Area of Cone (Sd): 57 cm². Total Q (Qts): 0.36. DC Resistance (Re): 6.3 ohms.