A 5-pack of black replacement nibs. This is the standard nib that comes with most Wacom pens.
Specifically, this nib is standard for these Wacom products:
Intuos5: KP300E2 (Classic Pen), KP400E2 (Airbrush Pen), KP501E2 (Grip Pen)
Intuos4: KP300E (Classic Pen), KP400E (Airbrush Pen), KP501E (Grip Pen)
Intuos3: ZP300E, ZP300ESE, ZP501E, ZP501ESE
Intuos2: XP120, XP300E, XP400E, XP501A, XP501E
Intuos1: GP120, GP300E GP400E
Any Bamboo: EP150E, EP155E (B,K,S,W,G)*, LP160, LP160E, LP161E, LP170ES, LP170G, LP170K, EP155EK, EP155EW
Cintiq (DTK): KP300E (Classic Pen), KP300E2 (Classic Pen), KP501E (Grip Pen), KP501E2 (Grip Pen)
Cintiq (DTZ): ZP300E, ZP300ESE, ZP501E, ZP501ESE
Graphire: EP100E, EP120E, EP130E, EP140E
Interactive Display (DTF Display Products): FP310, FP320, FP320E
Other: FP110, FP410, UP110, UP401, UP703E, UP710, UP710E, UP712, UP714E, UP714W, UP801E, UP803E, UP810E, UP811E, UP813E, UP817E, UP911E
