The TWSBI Diamond 50ml inkwell bottle is made from excellent quality glass with a useful, small internal reservoir meaning that even the last few drops can be used in piston filling fountain pens. It also features an innovative double cap, which means the Diamond 530, 540 and 580 pens can be filled from a value (when their nib units are removed) making filling a quicker and cleaner task.
The cap is Black aluminium with the high quality chrome and red TWSBI logo. The secondary aluminium cap, which houses the valve is available in Black, Red, Blue or Silver. The secondary cap can be removed completely and the black cap will fit directly onto the bottle. Please note that this is an empty ink bottle to be filled with your favourite ink to make it more useable.
TWSBI’s roots can be traced back to 1969, with the establishment of Ta Shin Precision in Taiwan. Having spent 50 years as an OEM manufacturer for numerous global companies, in 2009, they decided to launch their own brand of fountain pen – TWSBI. Ever since, their products have gained immeasurable popularity, thanks to their blend of scientific precision with modern flair. Their various ranges always prove a hit with customers, with the brand regularly seeking feedback from users prior to developing their next release.
UK Delivery Information
Free Royal Mail 48 (2-4 day) shipping on orders over £45.
Upgraded to 24 (1-2 day) or Special Next Working Day Delivery based on order value too. Learn More
Non-UK Orders
EU Orders will now have VAT applied at checkout, so there are NO fees due before delivery.
US Orders will have duties applied at checkout, so NO additional fees due before delivery
Other countries will be tax free at checkout, but duties may be charged by your local customs office before delivery - We cannot control this as each country has their own rules for different products.
