TEKTRUM 5 PIECES OF SOLDERABLE 2 x 2.75 inch EXPERIMENT FR4 PCB BREADBOARD, PLUS 140 PIECES OF PRE-FORMED SOLID MALE-TO-MALE JUMPER WIRE FOR PROTO-TYPING CIRCUIT/ARDUINO Each PCB has has the size of 2 x 2.75 inch (50 x 70 mm), and 432 solderable holes with standard 0.1" (2.54mm) pitch; 5 pieces of PCB in total has the size of 10 x 13.75 inch (250 x 350 mm), and 2160 solderable holes - large PCB size and many holes for prototyping; Single-sided high-quality durable FR4 glass-epoxy PCB breadboard; PCB has copper with an anti-tarnish coating for easy soldering Kit contains 140 lengths of solid wire jumpers in various colorsin a large compartment plastic case - many wires for selection Wires are male to male, solid, durable, easy to trace, easy to solder and de-solder