PCT-TRS-6 Universal RG-6 Coaxial Locking Compression Connector - qty 100 18mm Stroke length. All Metal Design - 100% brass body construction with Torque Retaining- Built in lock washer keeps the connection tight. Metal Compression Rings - Stay compressed and wont break down over time Continuous Ground - Improved ground contact when both tight and loose Dual O-Ring Design - Delivers a superior barrier against moisture intrusion Standards Conformance - Tested to ANSI/SCTE, ASTM, and Telecordia (formerly Bellcore) standards. Profesional grade. Use by many International communication and satellite broadcasting networks Super fast fulfillment shipping, deployed by Phat Satellite Intl