ACME Standard Rollerball 5888 Refill
- Length: 111.1mm (4.375″)
- Manufacturer’s website: ACME Studio
The ACME 5888 Standard Rollerball Refill is a rebranded Schmidt 5888 Standard Ceramic Rollerball (RB) refill. It will fit in any pen that takes a standard ceramic (European, international, safety) rollerball (RB) refill. The refill is only available from ACME in black ink. Numerous refill makers, including Jaymo and Monteverde, offer substitutes for this refill in other colors.