The SS4-20-3.00-L-D-K-TR is a 40-pole 2-row 0.4mm Ultra Fine Pitch Socket Strip with 10μinch (0.25μm) gold-plated phosphor bronze contacts and LCP insulator. It has 0.138-inch (3.51mm) DIA polyimide film pick and place pad. The SS4 series socket strip is compatible with ST4 series connectors.