Diplomat D41001002 Octopus ink bottle crafted from special ingredient that ensures extra smooth writing and care for the fountain pen. This black glass ink bottle is very smooth and well lubricated and features a fairly quick dry time. Diplomat D41001002 Octopus ink bottle has dimension 19.3mm diameter, 30 ml volume and 124g weight. The Diplomat D41001002 Octopus ink bottle is brand new in its original packaging.