ESI TFR-C6S Aluminum Slim Dual Clamp with Big Wing Knob Features: Slim Dual Design for mounting in tight areas. 360º Rotational Clamp (Non-Locking). Hook/Trigger-Style Clamp For 2" OD Piping. Material: AI 6061-T6 Aluminum. Min. Tubing Diameter: 1.9" (38mm). Max. Tubing Diameter: 2.008" (51mm). Max Load Capacity: 1,002 lbs (500 kg). TUV Approved Certification.