This mini universal solderless breadboard is composed of ABS plastic and tin phosphorus plated bronze contact chips, it has 400 contacts tie-points available. It can work with 20-29 AWG wire, perfect for circuit prototype design. Type: Mini Solderless Breadboard Model: BB-801 Available Contacts Tie-points: 400 Material: ABS Plastic & Tin Phosphorus Plated Bronze Contact Chip Voltage: 300V Electric Current: 3-5 Features: 400 Contact Tie-points Available, Mini Universal Solderless Breadboard Package Includes: 1 x Mini Solderless Breadboard.