$2.95
The Pilot PPL-5-5-BG B mechanical pencil leads work in both the Birdie and Birdie Twin mechanical pencils and are 0.5mm.
SPECIFICATIONS
PilotPPL-5-5-BG B Lead Refill for Birdie Twin
– CONTAINS: 1 cartridge of 12 leads
– TYPE: B Lead
– SOURCE: Made in Japan