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.

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Fisher Space Pen Ballpoint Refill Fine Blue/Sensa&parkr

Product ID: 254895579

Details

Brand
Fisher
Item dimensions L x W x H
8.9 x 0.5 x
Item weight
0.03 Pounds
Number of pieces
1
Style
Refill refills

🖊️Writes at any angle, zero gravity ready

🛠️Durable brass & steel build

❄️🔥Operates from -30°F to 250°F

1801 kr

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Description

🖊️ Write like a space explorer—anywhere, anytime.

WRITE BEYOND LIMITS - Fine blue ink that flows flawlessly even upside down or in zero gravity—because your ideas don’t wait for perfect conditions.
TRUSTED BY THOUSANDS - Join over 4,300 satisfied professionals who rate it 4.7 stars—because quality speaks louder than words.
SEAMLESS COMPATIBILITY - Perfectly designed to fit all Fisher Space Pen models, making your upgrade effortless and stylish.
BUILT TO LAST A LIFETIME - Crafted with premium brass and steel, precision assembled and hand-tested, backed by a lifetime guarantee against defects.
EXTREME TEMPERATURE PROOF - From Arctic chills to desert heat, this refill performs consistently between -30°F and 250°F—reliability you can count on anywhere.

The Fisher Space Pen Ballpoint Refill in fine blue ink delivers unmatched versatility with its ability to write at any angle, including zero gravity. Engineered to perform in extreme temperatures from -30°F to 250°F, it features a durable brass and steel construction, precision assembly, and a lifetime guarantee. Highly rated by thousands, this refill is the ultimate upgrade for professionals who demand reliability and style in their writing instruments.

Specifications

ASIN	B00168YNEO
Best Sellers Rank	#19,476 in Office Products ( See Top 100 in Office Products ) #166 in Pen Refills
Brand Name	Fisher
Country of Publication	USA
Customer Reviews	4.7 4.7 out of 5 stars (4,334)
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
Manufacturer	Fisher Space Pen
Manufacturer Part Number	SPR1F
Model Number	SPR1F
Number of Pieces	1
Package Size Name	Single
Point Type	Fine
Style	Refill refills (PR series)
UPC	097914378943 047609111119 747609111118
Unit Count	1 Count

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1801 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

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

3 weeks ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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