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