Enclosed Terminals. 2 Way(Pole) for the electrical cables, 4 fine copper connectors ensure a stablility of performance. Size. 29.2x21.2x15.2mm in the ceramic block, copper pole fits wire up to 3.5 mm. 5.5 mm diameter hole for mounting 2 Way Ceramic Terminals BlockBlock Size: 29.2x21.2x15.2mm(Length, Width, Height)Diameter of the copper hole: 3.5mmHole for mounting: 1Diameter of the mounting hole: 5.5 mmMaterials: Ceramics / PorcelainMaximum Operating Temp: 800 in CelsiusRated Voltage/Current: 380V/25AScrew Materials: Copper with Zinc plated Package Content:5 pcs 2 Way 5 Hole Ceramic Terminals Block