42x55x7 Double Lip Viton Rubber Rotary Shaft Seal

42x55x7 Double Lip Viton Rubber Rotary Shaft Seal

Marsoni

M251S

$17.41

Get it in 3 business days with 1 day shipping. Friday, May 29

42x55x7 Double Lip Viton Rubber Rotary Shaft SealAcrylonitrile butadiene rubber (NBR) is the material name for nitrile rubber. This material is very good for seals due to its make up. Nitrile rubber can tolerate short term dry running of the sealing lip. The operating temperature range without failure of nitrile rubber is 40 to +100 C. This also offers a special nitrile rubber compound with a temperature range between 55 and +110 C. Please click here for a full in depth look at the range of seals

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The author, Andy Greenberg, takes the reader through a series of actual whodunit cases where the blockchain is used to trace illicit transactions on the dark web. From corrupt FBI agents to drug sales on the Silk Road, culprits are rooted out by following cryptocurrency through the blockchain. Each case is different and often involves an international game of cat and mouse. In addition, the author discusses some of the ethical issues surrounding an anonymous currency. Most readers will find this book an easy and engaging read, even if they are not familiar with the blockchain.

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Reviewed in the United States on February 19, 2024

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Rachel Gollub

San Leandro, US

★★★★★ 4

Fascinating look at Bitcoin privacy

Format: Kindle

This is a great look at what Bitcoin is and isn’t. The misconceptions about it gave rise to tools to track it, leading to the high profile cases Greenberg covers in the book. Not a highly technical book, but there are enough references to papers and authors to find out more. Very cool,

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Reviewed in the United States on January 3, 2023

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Massapequa, US

★★★★★ 5

Excellent non-fiction cryptocurrency sleuth story.

Format: Paperback

I thought this book was an excellent non-fiction account about how a team of "Cyber-Investigators" tracked and took down several criminals using Bitcoin for drug deals and other nefarious activities. The book read like a novel. I enjoyed it and had trouble putting it down.

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Reviewed in the United States on October 3, 2025

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Shereen Baba

Los Angeles, US

★★★★★ 5

Name Craft Lesson

Format: Board book, Format: Board book

Loved reading this book and tying it into a name craft for my toddler!

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Reviewed in the United States on April 29, 2026

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