Keep your 3mm LEDs in place with these little plastic LED holders. These are handy for projects using individual LEDs as they look sleek, and your LED won't budge. Slot the LED through the opening and you'll get a nice *snap* into place.
Adafruit have these holders in different sizes:
Comes as a pack of 5, and no LEDs are included.
- Outer Diameter: 4mm / 0.15"
- Outer Beveled Diameter: 6mm / 0.2"
- Length: 5mm / 0.2"