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Color: A-navy    Number of Items: 1

The third entry into the New York Times bestselling series, To Challenge Heaven brings another thrilling adventure from the masters of military science fiction, David Weber and Chris Kennedy. In a universe teeming with predators, humanity needs friends. And fast. We've come a long way in the forty years since the Shongairi attacked Earth, killed half its people, and then were driven away by an alliance of humans with the other sentient bipeds who inhabit our planet. We took the technology they left behind, and rapidly built ourselves into a starfaring civilization. Because we haven't got a moment to lose. Because it's clear that there are even more powerful, more hostile aliens out there, and Earth needs allies. But it also transpires that the Shongairi expedition that nearly destroyed our home planet ... wasn't an official one. That, indeed, its commander may have been acting as an unwitting cats-paw for the Founders, the ancient alliance of very old, very evil aliens who run the Hegemony that dominates our galaxy, and who hold the Shongairi, as they hold most non-Founder species, in not-so-benign contempt. Indeed, it may turn out to be possible to turn the Shongairi into our allies against the Hegemony. There's just the small matter of the Shongairi honor code, which makes bushido look like a child's game. We might be able to make them our friends -- if we can crush their planetary defenses in the greatest battle we, or they, have ever seen...

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Color: Dark Red   

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Color: Black/White/Pink   

- 【SUNLU PLA 3D Printer Filament】- SUNLU PLA filament is reliable, versatile, and easy to use. No clogs, bubbles, or tangles, its excellent layer adhesion ensures high-quality prints every time. - 【Neatly Wound 3D Filament Spool】- SUNLU's self-developed neat winding device ensures that the filament is easy to use, with a 100% neat rate that reduces the risk of tangles and jams, and provides a smoother and more efficient 3D printing experience. - 【Clog-Free & Bubble-Free】- Designed and manufactured with superb layer bonding and great fluidity for smooth and stable extrusion. - 【PLA Filament 1.75 mm】- SUNLU PLA filament consistent diameter tolerance 1.75mm ±0.02mm, Tight tolerances make PLA filament smoother and more consistent when printing. - 【Easy to Use】- SUNLU PLA filament is reliable and user-friendly, making the printing process smooth and effortless for both beginners and experts - 【Filament Spool Diameter】- PLA 1KG Spool Diameter: 195mm, Spool Width: 59mm, Spool Hub Hole Diameter: 63mm. Compatible with 99% of 3D printers. - 【PLA Recommend Settings】- To achieve the best printing results with SUNLU PLA filament, we recommend printing at a nozzle temperature of 200-230°C, a bed temperature of 50-65°C, and a printing speed of 50-100mm/s. - 【Wide Compatibility】- SUNLU PLA filament has a diameter accuracy of +/-0.02 mm, small diameter error, wide compatibility, and can be used on various common 3D printers. - 【Vacuum Packaging】- SUNLU 3D Printer Filaments are sealed in airtight vacuum packaging which ensures that they remain moisture-free and preserve their quality from the factory to your 3D printer. - 【SUNLU Main 3D Products】- SUNLU offers a wide range of high-quality 3D printing products, including 3D printer filament, filament dryer, FDM 3D printer, 3D printer resin, LCD 3D printer, resin curing box, and other accessories, providing you with everything you need for a successful 3D printing experience.

Color: 1kg New Transparent - Mint Ice    Size: 1KG

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