Features 1、Universal prototype PCB circuit board, double sided, tin plated, used for point to point DIY soldering 2、Universal PCB board is 4 x 6cm, 2. 54mm hole pitch, hole diameter is Approx. 1mm 3、Great for building a prototype of an electronic circuit. 4、Referencing letters printed on both sides for easy reference of individual holes. 5、The board is treated with flux for easy soldering and extended serving life. Specification Features: Universal prototype PCB circuit board, double sided, tin plated, used for point to point DIY soldering. Universal PCB board is 4 x 6cm, 2. 54mm hole pitch, hole diameter is Approx. 1mm Great for building a prototype of an electronic circuit. Referencing letters printed on both sides for easy reference of individual holes. The board is treated with flux for easy soldering and extended serving life. Specifications: Material: FR-4, Tin Hole Diameter: Approx. 1mm Hole pitch: Approx. 2.54mm Install Hole Dia: Approx. 2mm Size: Approx. 4 x 6 cm / 1.57 x 2.36in Weight: 70g Package included: 10 x Universal Circuit Board Package List