Features - High-quality:ISO9001:2008/CE/SGS/RoHS/CAS strictly and According to UL486 requirements - Fully insulated structure design, safer when used - Accept a combination of solid and stranded wires for single and multiple applications - Stainless steel inserts restrict pull-out -Visual verification of connection - Flame Retardant - Pretty easy to use( just push the wires into the ports). - Good electrical insulation - Corrosion resistance