I have been made aware of a design change to the TWSBI 700R vacuum filling pen. The change is that the housing that contains the nib and feed can no longer be removed from the pen’s section. This design change means that the ZT7E can no longer fit the 700R pens that have this new design.
Before buying a ZT7E, be sure to check if your pen’s section can be disassembled as shown in the product page for this product.
More information here from JetPens on TWSBI disassembly.
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