2.54Mm Closed Short Circuit Cap Jumper Cap Blocks Connector, Black 40Pcs

What is this?Jumper cap for use on Hard Drives, Circuit Board, Computer Interface cards, etc.What will I get?Model: Standard 2. 54mm/0.1inch pin spacingSize: 6.3mm x 5mm x 2.38mm/0.25 inch x 0.2 inch x 0.09 inch(L*W*T)Color: BlackMaterial: PlasticIn the package of: 40pcs x Jumper Caps Are there any advantages of the product?Standard 2.54 mm jumper caps are used for controlling the settings of your internal devices' motherboards. Optimize your system configurations with standard jumper caps.How to use it?Jumper cap, Which is an active part, The outer layer is insulated plastic, The inner conductive material can be inserted in the jumper pin above the two jumper pin connected;When the jumper cap is fastened to the two jumper pins, It is on and the current is passing through, Which we call ON.On the contrary, do not buckle the jumper cap, It means is disconnected, Call it OFF.What should I notice?Please allow 1-3mm error due to manual measurement. Thanks for your understanding.