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 Ballpoint Pen Refill, Black (B) Bold Point

Fisher Ballpoint Pen Refill, Black (B) Bold Point

Product ID: 738532410

Details

Brand
Item Weight
0.01 Kilograms
Item dimensions L x W x H
8.9 x 0.5 x cm
Number of Pieces
1
Style
Ball Point

⚡Instant ink flow from first stroke

🌧️All-weather ink, reliable in any condition

🖊️Bold 1.0mm tip for standout writing

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Description

🖋️ Write Boldly, Lead Confidently — The Refill That Means Business

BOLD CLEAR - 1.0mm tip delivers striking, easy-to-read lines for professional notes and signatures.
COMPACT LIGHTWEIGHT - Slim 3.4-inch refill fits seamlessly into your favorite Fisher pen for on-the-go productivity.
INSTANT INK ACTIVATION - No skips or smudges; writes smoothly from the very first stroke after any downtime.
ALL WEATHER RELIABILITY - Specialized ink formula ensures flawless writing even in extreme conditions—rain or shine.
TRUSTED BY PROFESSIONALS - Preferred refill for emergency responders and managers who demand precision and durability.

The Fisher Bold Black Ballpoint Pen Refill (1.0mm) offers a premium writing experience with all-weather ink that performs flawlessly in any environment. Trusted by professionals worldwide, this compact refill ensures instant ink flow and bold, clear lines, making it an essential tool for managers and emergency personnel who value reliability and precision.

Specifications

ASIN	B000FTGCFI
Amazon Bestseller	#12,921 in Office Products ( See Top 100 in Office Products ) #411 in Ink Pen Refills
Brand Name	フィッシャー(Fisher)
Customer Reviews	4.6 4.6 out of 5 stars (10,582)
Global Trade Identification Number	00747609113419
Ink Color	black
Item Dimensions	8.9 x 0.5 x 0.5 cm
Item Weight	0.01 Kilograms
Manufacturer	フィッシャー(Fisher)
Manufacturer Part Number	SPR4B
Model Number	SPR4B
Number of Pieces	1
Point Type	Bold
Style	Ball Point
UPC	747609113419
Unit Count	1.0 Count

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55.12 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

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