1.1x3.0 x7.5mm tip Chromebooks and Aspire R13, Switch 12 Alpha, TM B1 Series, TM X349, TMX3310, TMX3410, TMP614, TMP215(G) Also S7, W700, Chromebook 11 CB3-111, 13 CB5-311, Acer Aspire V3-3x1, C730E,C731,C738T, TMP 236-M, TMP 238-M, TM B117, TM X349, R13 (SKI 2), Switch Alpha 12, R7-371T & Aspire One AO1-131,Acer Chromebook 11 CB3-111, 13 CB5-311, Acer Aspire V3-3x1, C730E,C731,C738T, TMP 236-M, TMP 238-M, TM B117, TM X349, R13 (SKI 2), Switch Alpha 12. Spin3 Spin 5 also R7-371T & Aspire One AO1-131, Chromebook C731 replaces NB4540