AspenTek 10 PCS 2.1 X 5.5mm Male DC Plug to 9V Battery Clip Snap Accessories For Arduino Plug Type: 2.1 x 5.5mm Male to 9V Battery Clip Length:12cm 4.72 inch Material: Plastic and Stainless material Great to use for LED strip light or arduino Package includes: 10 pieces T Type Battery Buckle