1, This cable is made of 8 strands* 0.08 mm*37 cores 6N OCC copper Single Crystal Silver Plated wires, and the sheath is made of FEP, which has excellent temperature resistance range: -65~3002, Connector: 4-pin XLR Balanced Malethe connectors shell are made of the walnut wood / Solid Wood - Walnut + Brass Gold Plated3, This replacement cable with 4-pin XLR Balanced Male is compatible with Sennheiser HD650, HD600, HD580, HD660S, HD660S2, HD58X, HD565, HD545, HD535, HD525, HD265, Massdrop HD6XX headphones