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Description
Gray MattersGray Matters is described by Henry Marsh, author of Do No Harm, as A fascinating and wide ranging account of what neurosurgery is really about the past, present and future. Since its inception in the early twentieth century, brain surgery has maintained an air of mystery. As the saying its not exactly brain surgery suggests, the specialty has become synonymous with a level of complexity and meticulousness rivalled only by, well, rocket science. Warm,
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- Free Standard Shipping on $100+ Orders to the USA.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.7 ★★★★★
Based on 318 reviews
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Product Reviews
★★★★★ 5
Love these
Color: B/B/B/B
Always great product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
De buena calidad!!
Color: B/B/B/B, Color: B/B/B/B
Me encanta las tintas hippos hacen que mis proyectos con subñimacion queden perfectos . Color vibrantes. Compatible a mi impresora Empson ET4800. Vale la pena el precio .
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Ink
Color: B/B/B/B
Great?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 23, 2025
★★★★★ 5
Ink is very cost effective as I use more black ink than any of the others
Color: B/B/B/B
I've only used Hiipooo ink and when I saw this, I decided to order for "just in case." Since I hadn't had to refill my printer, I thought I'd better open the box and reply to the review. Now that I've opened, I see that I have 4 bottles to refill and four syringes. So I assume it is not going to be as easy as the initial fillup when I first purchased the Epson ET 15,000. Now, I have questions as to how I'm to refill my printer. The top of the refill bottle does not have the same opening as the printer and when I tilted the bottle, a drop of ink came out. I didn't like. And there are no instructions to direct the process of refilling.
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Reviewed in the United States on December 20, 2023
★★★★★ 5
Love Hiipo brand sublimation ink!
Color: B/B/B/B
I have used Hiipo ink for a while now but I ran out and ordered this one. It’s exactly as advertised with the easy fill top. Highly recommend! All of my prints turn out perfectly. I use this with my Epson ET 15000.
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Reviewed in the United States on December 29, 2023
