Check the listing for details. Makeblock Style Base Bracket B with 12 plastic pins Pack of 1. Condition: New. Listed at 12.00 USD. Ship from USFast and Free Delivery Features:Made from high quality Acrylic, 3.175 mm thick.Sold in Packs of 1 with 12 pins Base Bracket is a kind of multi-purpose bracket which can use for Arduino, Meduino, Me BaseBoard, Battery Holder, and even Raspberry Pi. Base Bracket B is bigger than Base Bracket A and has more holes to connect with electronic boards and mechanical parts. Additionally, the two biggest holes in the bracket will allow the RJ25 cables to go through. Plastic Rivet 3075, Plastic Rivet 4060 and Plastic Rivet 4100 are included. Users can choose Plastic Rivet3075 to connect Base Bracket with Arduino or Meduino, choose Plastic Rivet 4060 to connect Base Bracket with Battery Holder, and choose Plastic Rivet 4100 to connect Base Bracket with Base Board.Part List:1 x Base Bracket B4 x Plastic Rivet 30754 x Plastic Rivet 40604 x Plastic Rivet 4100