Gravitas Sentry Aluminium Black Anodised Fountain Pen with Steel Nib

Gravitas built the upgraded Sentry a notch bigger and heavier than its entry-level sibling, then balanced the section so it still feels natural in hand. Triple-start ACME threads on the cap release in 2.25 turns, and a Delrin sleeve lets you post the cap without marking the barrel.

Cut from a solid rod of aluminium, this version gets a bead-blasted anodised finish in black, a texture Gravitas hadn't used before. Two o-rings handle the details: a black one keeps the section-to-barrel joint solid, and a red one seals the cap shut and stops it working loose. The 25mm-long stainless steel alloy section tapers from 13.25mm to 11.5mm, wears a black PVD coating and has circular grooves machined in for grip. Cap and barrel are anodised black with a matte texture.

A size 6 steel nib made by Gravitas runs on an ABS plastic feeder and comes in Extra Fine, Fine, Medium and Broad; Jowo No. 6 threads are compatible with it.* Every pen arrives with a standard international plug-in cartridge converter.

*Swapping to a different nib unit means you check the fitment yourself. We can't take responsibility for damage caused by non-Gravitas nibs or nib units.

Pen Dimensions
- Length of Pen (with cap on): 145.7mm
- Length of Pen (with cap off from bottom to nib): 139mm
- Length of Grip Section: 38mm
- Actual weight: 2.5 oz
- Weight with Cap: 34g
- Weight without Cap: 28.34g

Specifications
- Type: Fountain Pen
- Body Material: Aluminum
- Cap Type: Screw
- Filling Mechanism: Cartridge / Converter
- Nib Material: Stainless Steel, #6
- Postability: Yes

Comes With
- Large Zippered Case
- Standard International Converter