These are your run-of-the-mill 1/4 Watt  5-band resistors. Commonly used in breadboards and other prototyping applications, these 330 ohm resistors make excellent LED current limiters and are great for general use. These thick-lead versions of the resistors fit snugly into a breadboard with very little movement, so you should have few to no issues using them in your next project!

These resistors come in bags of 500 (ish)