ACRYLIC MATERIAL FLEX NIB FOUNTAIN PEN ,VINTAGE FEEL , 3 IN 1 FILLING SYSTEM ie. Regular(eyedropper), cartridge and converter Medium size pen with height 140 mm . NIB SIZE - 35 , Silver Plated Flex Medium NIB , which is really very smooth in writing WEIGHT OF PEN IS JUST - 16 grams This is extreme light weight fountain pen made with pure acrylic material Beautiful Silver double rings on cap With Silver clip Pen comes with converter , Packed in a velvet pouch .