does this refill fit the AG7 model pen?

I am not sure. The packaging doesn't reference which Fisher pens this refill will work with, but it comes with an adapter which makes it longer. I use it without the adapter for the Fisher Space Bullet pen. According to the description on Amazon, this refill should fit most Fisher pens.

Anybody know the actual size of the tip?

I'm not exactly sure what Tip your talking about but the end of the cartridge is just under 3/32" (0.086") which is just above 1/16" and the ball is about 3/64" (0.0469") which is just below 1/16". if you need more clarification I can measure the cartridge more.

will this fit a cross pen?

No, it fits Parkers ( with the adapter) and fisher

Will it fit in the ti-pocket pro? (big idea company llc)

I watched the ti-pocket pro video and I would say no.

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Fisher Space Pen - 3 Pressurized Cartridges Blue Ink Fine Point #SPR1F

Product ID: 17473495

Details

Brand
Fisher
Item Weight
0.02 kg
Item dimensions L x W x H
9 x 6 x 0.2
Number of Pieces
3
Style
Space

🖊️Writes at any angle, zero gravity ready

🛠️Durable all brass & steel build

❄️🔥Operates from -30°F to 250°F

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Description

🪐 Write like a space explorer—anywhere, anytime.

BUILT TO LAST - Crafted with premium brass and steel, this pen refill withstands the test of time and adventure.
WRITE BEYOND LIMITS - Effortlessly jot notes upside down, underwater, or even in zero gravity—because your ideas don’t wait.
TRIPLE PACK CONVENIENCE - Three refills per order mean you’re always prepared—never miss a critical moment again.
TRUSTED BY PROFESSIONALS - Top-rated with 4.6 stars and proven longevity, these refills outperform standard cartridges every time.
EXTREME TEMPERATURE PROOF - Reliable ink flow from freezing cold to scorching heat, perfect for every environment you conquer.

The Fisher Space Pen 3-pack of pressurized blue ink refills features fine point tips that write smoothly at any angle, including zero gravity. Engineered to perform in extreme temperatures from -30°F to 250°F, these durable brass and steel cartridges ensure consistent, leak-free writing. Ideal for professionals who demand reliability, each pack includes three long-lasting refills compatible with Parker pens, backed by a strong 4.6-star rating and trusted for years of dependable use.

Specifications

ASIN	B00DAVGKGY
Best Sellers Rank	#129,665 in Office Products ( See Top 100 in Office Products ) #962 in Ink Pen Refills
Brand Name	Fisher
Customer Reviews	4.6 4.6 out of 5 stars (495)
Ink Color	Blue
Item Dimensions	9 x 6 x 0.2 inches
Item Weight	0.02 kg
Manufacturer	Fisher Space
Manufacturer Part Number	BUN-SPR1F-x3
Model Number	BUN-SPR1F-x3
Number of Pieces	3
Package Size Name	Pack of 3
Point Type	Fine
Style	Space
UPC	637122808612
Unit Count	3 Count
Warranty Description	30 days

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9907 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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