Type: 2.54mm 40 Pins Single Row Straight Round Female Socket Pin Header Strip Color: Black Specification: Type: Female Header; Pitch: 2.54mm; Number of Pins: 40 Pin; Row Type: Single; Connector Type: Straight Use:such as: electronic circuit, electrical appliances, instrumentation ,PCB circuit board etc. electronic project. Package: 10pcs 40 Pin Black Round Female Socket Pin Header Single row of 40-holes, female header with round machined pins. These units have very high quality round pins to accept and retain machine pin headers much better. Can be cut to size with a pair of wire-cutters. Standard .1" spacing.