These are 1/4th Watt, +/- 5% tolerance PTH resistors. Commonly used in breadboards and perf boards, these 1K Ohm resistors make excellent pull-ups, pull-downs, and current limiters.
Note: Although these come in bags marked with a quantity of 25, they don't always contain 25. So we'd rather call it 20 and hope that you get extras.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
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