Features:_x000D_ _x000D_ The breadboard is made of ABS plastic, very durable to use. _x000D_ With tight plug-in contacts, the components will sit well after assembly and nothing will wobble. _x000D_ Each row and columns has corresponding letters and numbers, reduce the mistake handling. _x000D_ They are recycled, environmental and recyclable. _x000D_ With self-adhesive tape on the back, make it easy to stick on the breadboard shield or a flat surface. _x000D_ _x000D_ Specifications:_x000D_ Material: ABS_x000D_ Color: Black, Blue, Green, White, Red_x000D_ Size: 5 x 3.5cm / 1.97 x 1.38inch_x000D_ Hole number of each breadboard: 170 Holes_x000D_ Weight: Approx. 69g_x000D_ _x000D_ Package Included:_x000D_ _x000D_ 5 x Mini Breadboard _x000D_ _x000D_ _x000D_ Note: Jumper wires are NOT included. 1The breadboard is made of ABS plastic, very durable to use 2With tight plug-in contacts, the components will sit well after assembly and nothing will wobble 3Each row and columns has corresponding letters and numbers, reduce the mistake handling 4They are recycled, environmental and recyclable 5With self-adhesive tape on the back, make it easy to stick on the breadboard shield or a flat surface