Ducale Murano Astratto It features a core made of pearlescent resin enriched with enchanting swirls and abstract shapes. The vibrant blues, reds, and oranges in this special pen pay homage to the Murano Islands and its centuries of excellence in glass production. All Montegrappa writing instruments are guaranteed against any manufacturing defect for 24 months from the date of purchase. Any part of this pen with a minor manufacturing defect discovered by our authorized customer service department will be repaired or replaced under warranty. To benefit from the international guarantee, simply present the international guarantee certificate, correctly filled in by one of our authorized dealers, complete with stamp and date, to one of the Montegrappa service centres.