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These Made in the USA bushings are the equivalent of the regular Sierra (20A) bushings. They use a standard "A" mandrel and work with the following kits:

- Sierra Twist Ballpoint Pen Kit
- Sierra Button Click Pen Kit
- Sierra Button Click Pencil Kit
- All Elegant Sierras
- All Elegant Beauty Sierras
- Sierra Grip
- Sierra Nomad
- Pensar Ballpoint Pen Kit
- Virage Ballpoint Pen Kit