2 Pack Premium 2390 Tie Point Solderless Breadboard with 4 Binding Posts, Metal Backplate Trace and write number for children. Exercise for children to recognize Trace and write number for children. Exercise for children to recognize Premium Vector Trace and write number for children. exercise for. 2 Pack premium solderless breadboards ideal for testing, prototyping and experimentation Each breadboard features 2,390 Contact Points total, 3 terminal strips and 5 bus strips 4 binding posts for easy connection to external power sources Sturdy aluminum backing with rubber feet Size: 9. 4" x 7. 7" 2 Pack. The 03MB611 is a premium solderless breadboard ideal for testing, prototyping and experimentation. It features 3 terminal strips and 5 bus strips for a total of 2,390 contact points. The breadboard also has 4 binding posts for easy connection to external power sources. Sturdy aluminum backing and rubber feet are also included. Measures 9. 4" x 7. 7".