We occasionally need to quickly prototype and verify a design, so we created these perfboards to help speed up the proof of concept process. Since we are able to panelize these boards we would like to share them at a reasonable price and hope that you can find a use for them in your projects as well. Each 50mm x 100mm perf-board has 4 non-plated mounting holes with a diameter of 3.302mm (130mils). There are 691 plated through-holes on a 2.54mm (100mil) grid with 1.106mm (40mil) drill and 1.6764 (66mil) pad diameters. Solder Mask: BlackSilk Screen: WhiteDimensions: 1.96″ x 3.94″ (50mm x 100mm) Full v-scored sheet with 2 boards (2×1 array) is 100mm x 100mm. Thanks for looking!