The Universal 4 Pin Buckled Cable is made for the Grove System to connect all of the Twigs to the Stem - Basic Shield or to other Twig compatible boards for quick prototyping. As a lot of users ask for different length of cables, so we made the 5cm,20cm,30cm,40cm,and 50cm cables for different applications. The 20cm cable is in default included in the Grove - Starter Bundle. https://elecena.pl/product/3972595/grove-przewody-4-pin-20cm-5-sztuk 2013-03-18 https://elecena.pl/product/3972595/grove-przewody-4-pin-20cm-5-sztuk 2015-09-08 https://elecena.pl/product/3972595/grove-przewody-4-pin-20cm-5-sztuk 2018-10-19