1. The contact point is gold-plated, not easy to fade, will not oxidize, good contact performance, the shell is a zinc alloy material, very beautiful 2. Use: for DIY headphone cable, AUX cable 3.5 audio cable, etc. 3. Material: zinc alloy 4. Rated load: 1VA 5. Insulation resistance: 5 megohm 6. Applicable wire O.D.: the width of the outlet hole is 3.5mm; soft material, large wire available mm line 7. Packing: bag 8. Size: about 42 x 10mm 9. Weight: about 12g