This is a splittable 40 pin 100mm length male - female/ dual male jumper wire for 2.54mm, it is very flexible, can be using at bread board or other place need connection. it is able to transformed from 1-40 pin jumper wire. There also have 40pin wire which have same specification in here.
40 pin Male - Female Splittable Jumper Wire- 100mm x1
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