Is there a difference between the spr4 and the pr4?

The "PR" stands for Pressurized Refill and the PR4 is the black refill that fills most of the standard Fisher Space pens and other similar pens. If the code ends in a "B", then it's a bold, or ends in a "F" then it's a fine point. The numeric value after the PR indicates the color (1= blue 2=red, 3=green, 4=black, etc. I believe that the "SPR" simply means that the package includes the little plastic adapter piece that makes the refill Parker compatible. All my refills are the SPR version and work in either Fisher Space Pens (without the plastic adapter) or in my Parker Jotter pens (with the adapter). BTW - Fisher also makes refills with a label "C" like C1 or C4 which are for Cross pens.

Will this refill work in a Bullet space pen?

Greg K,This refill does work correctly in several Bullet Space Pens I purchased!

What is the tip size? I like a solid 1.0, would that be medium or bold?

I would have to say this is more of a medium than a bold. Most 1.0 pens that I have purchased like the Pilot G-2 or Uniball 207 Gel Impact are bold, which I prefer. The Fisher Space Pen refill is less so to me, but still good. What I REALLY like about the Fisher is how exceptionally smooth the ink flow is.

Space Pen Ballpoint Refill Fine Blue Sensa And Parkr

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€ 17.95

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Description

🪐 Write like a space explorer—anywhere, anytime.

WRITE BEYOND LIMITS - Effortlessly scribble in zero gravity or upside down—no penmanship boundaries.
FINE BLUE INK PRECISION - Sharp, clear blue ink for professional documents and creative notes alike.
BUILT TO LAST A LIFETIME - Premium brass and steel construction with precision assembly ensures durability and timeless style.
EASY REFILL ENDLESS USE - Simple replacement refill keeps your iconic Fisher Space Pen ready for every mission.
TEMPERATURE PROOF INK FLOW - Reliable writing performance from Arctic chills to desert heat—your pen never quits.

The Fisher Space Pen Ballpoint Refill in fine blue ink is engineered to write smoothly at any angle, including zero gravity, and withstands extreme temperatures from -30°F to 250°F. Crafted from durable brass and steel, each refill is precision assembled and hand-tested, backed by a lifetime guarantee. Ideal for professionals who demand reliability and style in every stroke.

Specifications

ASIN	B00168YNEO
Best Sellers Rank	#28,245 in Office Products ( See Top 100 in Office Products ) #251 in Pen Refills
Brand	Fisher
Brand Name	Fisher
Customer Reviews	4.7 out of 5 stars 4,318 Reviews
Global Trade Identification Number	00747609111118, 07476091111186
Included Components	9004524
Ink Color	Blue
Item Dimensions	8.9 x 0.5 x 0.5 centimeters
Item Weight	14 g
Item dimensions L x W x H	8.9 x 0.5 x 0.5 centimeters
Item weight	14 g
Manufacturer	Fisher Space Pen
Manufacturer Part Number	SPR1F
Model Number	SPR1F
Number of Pieces	1
Number of pieces	1
Package Size Name	Single
Point Type	Fine
Point type	Fine
Style	Refill refills (PR series)
UPC	097914378943 047609111119 747609111118
Unit Count	1 Count

Reviews

K**T

Refill per penna tattica

Anni fa mi hanno regalato una bellissima penna tattica del marchio Colt che uso anche come penna in caso di necessità, da diverse ricerche sul web ho trovato che questi refill sono i migliori e adatti alla sostituzione dello slot dell'inchiostro e così è stato, è perfetta, per sfizio ho voluto provare il color marrone e scrive benissimo!

13.12.2019

R**R

Great refill for an even greater pen

Best pen out there. Writes on any and all surfaces and in any temperature and it's indelible. I just wish they offered an ultra fine point instead of just the fine point. Refill lasts a long time and is easy to buy and use.

25.04.2026

D**0

Great

Great original replacement

19.07.2026

B**L

Fisher space green refile

Rare in green

16.11.2021

C**S

Fisher Space Pens Are The Best

Fisher refills work any time anywhere. I use nothing else in all my pens.

6.06.2016

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TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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4 days ago

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