... screen) Height: 30milMin. drilling slot size: 0.6mmSolder mask color: green, black, blue, white, yellow, purple, and matt, etc.Solder mask hardness ... : 6HLegend/Silk screen Color: white, yellow, black, etc.Surface Treatment: HAL, Lead Free HAL, Immersion gold, OSP ... technical support.5.OEM and ODM service are welcome. PCB with green solder mask factory