"2.54mm 40Pin Single Row Black" likely refers to a 40-pin single-row male or female header with a 2.54mm (0.1 inch) pitch, commonly used in electronic circuits and prototyping. Here’s what each part means
Pitch: 2.54mm
Gender of Connector: Male
Number of Pins: 40Pin
Type of Row: Single-Row
Type of connector: Straight
Color : Black: