2 Black Speaker Spring Clip Keystone JacksSpring clip connection for optimum audio qualityAvailable in pairs (red and black push tabs for polarity identification)apable of using up to 12 AWG speaker wires for front connectionEasy Installation with solder-less crimp-on rear wire connectionSuitable for 16-12 AWG speaker wiresCompatible with standard faceplates, inserts, surface mount boxes, and blank patch panelsUL listed This product ships in approximately 1 days