'-A pack of 20 RJ11 modules plug, suitable for voice communication, two pins, transparent colour, the length is13.30±0.2mm. Compatible with both solid and stranded wire. • COMPATIBILITY - Phones, modems, answering machines, fax machines, routers, caller ID's, and more, this connector can be applied to telephone lines and widely used in home or office cable systems. • PERFORMANCE - Modular jack has PC housing with pins purity of copper wire higher than 99.99% for Fast and accurate data transmission. 3 Micron gold plated pins provide better contact and transmission performance. Extremely high-quality module plugs. • CONVENIENCE - Just make sure they are in the correct order before crimping the plugs, compatible with most styles and models of RJ11 crimping tools. • STURDY AND DURABLE - The combination of gold-plated contacts in a clear, sturdy PC housing."