Image not available$75
1 retailer
Backpacker Pen
The Fisher Space Pen Backpacker Pen is a 103.9 mm (4.1 in), 14.2 g aluminum pen that ships with the Fisher pressurized PR4 refill.
- Length
- 103.9 mm (4.1 in)
- Weight
- 0.0 lb · 14 g
- Mechanism
- Not published
- Refill
- Fisher pressurized PR4
Image not availableColor not published
Review score
From 1 review, weighted by each site’s popularity
7.8/ 10
Select a site to leave it out.
Read the reviews: Pack Hacker review (opens in new tab) (Feb 26, 2026). Each site’s scale is converted to our 1–10 scale and averaged; more-visited sites count more (how).
What the data says
- Lighter than 50% of the 14 other pens we list in the 94–114 mm range.
Computed from the specs below. How we write summaries.
Full specs
Last verified Oct 17, 2026
Fisher Space Pen’s own site doesn’t allow automated reading, so specs, prices and photos come from Garage Grown Gear’s product page (garagegrowngear.com), a retailer that sells it. Unless marked otherwise, every spec is quoted from that page.
| Length (closed) | 103.9 mm (4.1 in) |
|---|---|
| Diameter | 10.2 mm |
| Weight (manufacturer) | 0.03 lb (14 g) |
| Ink | Pressurized (space pen) |
|---|---|
| Refill (as shipped) | Fisher pressurized PR4 |
| Compatible refills | any PR refill |
| Writes upside down | Yes |
| Body | Aluminum |
|---|
Similar pens from other brands
Image not available
Image not available$34
1 retailer
Image not available$34
1 retailer