Lead-Free / RoHS 3 Compliant / REACH Compliant Surface mount solder breadboard. Surface mount pads on 0.1" matrix on one side. Pad pitch of 2.54mm (0.1") center-to-center. Pads are 2.0mm x 2.0mm (0.079" x 0.079") in size. Space between pads is 0.54mm (0.021"). 21 rows, 20 columns. Dimensions: 2.1" x 2.3" x 0.0625" PCB construction: FR-4 UL94V-0. PCB operating temperature range: -40C to +130C. PCB reflow maximum temperature: +260C.