Options: Variations: 88K8351 - Bushing Set for New Series Rollerball & Fountain Pen Hardware 1 - $11.90 10 - $10.15 25 - $8.95 50 - $8.40 Bushing Set for New Series Rollerball & Fountain Pen Hardware These soft-iron bushings are specifically sized to match the brass sleeves in our New Series rollerball and fountain pen hardware kits.