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Protoboard, 2.43X2.72", 1 Sided Fits Enclosure 2138441, 2138450
Descriptions of BusBoard PR1593Q provided by its distributors.
Prototype Enclosure Boards 2.4 x 2.7 in. (62 x 69mm)
Mouser
FR4 Proto-board PCB Board with 2 Hole Strip
Verical