Opus 88 Demonstrator Fountain Pen in Sapphire – Fine Point – NEW in box. For true purists of the writing experience, Opus 88 crafted the DEMO with sparkles and swirling acrylic resin. Enjoy watching your ink color of choice slosh around the massive 3.5mL capacity of this eyedropper filling fountain pen. Engineered for serious fountain pen enthusiasts who love to use their pens to write at extreme length, the Opus 88 Demonstrator is one of the few modern pens to feature an eyedropper filling only system that has a shut-off valve. More commonly found in Japanese vintage fountain pens, the valve regulates the ink flow to prevent ink burping on the page. Opus 88 Demo Eyedropper Filling Fountain Pen Details. Barrel and Cap crafted from acrylic resin with swirls of white, light blue and dark blue. Nib: Stainless steel #6 nib with plastic feed. Filling System: Eyedropper (includes glass eyedropper) with shut-off valve to safeguard against leakage. Pen Length Closed: 5.63 in. Pen Body Max Diameter: 0.63 in. 9 oz / 23g. Ink Capacity: 3.5ml. Gift boxed with an instruction booklet and eyedropper. AUTHENTIC & GENUINE PRODUCTS. We are an authorized dealer for all the brands we carry. We do not sell imitations of any sort and only carry genuine, original brand name writing instruments and accessories. Please refer to your local import laws for details. We strive for your ultimate satisfaction. We cannot accept opened and used bottles of ink, ink cartridges, used notebooks, engraved pens or pen cleaning supplies. When you receive any new fountain pen, we recommend to inspect it thoroughly and if necessary, lightly dip the nib tip in washable ink to test it. Make sure all of your auctions have ended prior to checking out.