Get a comprehensive, in-depth introduction to the core Python language with this hands-on book. Based on author Mark Lutz’s popular training course, this updated fifth edition will help you quickly write efficient, high-quality code with Python. It’s an ideal way to begin, whether you’re new to prog...

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Battery Tender Charge controller for any solar panel. Panel is not provided.

A large, Polk Audio MC80 basic in-ceiling loudspeaker makes dynamic whole-house audio possible for the first time. With an 8-Inch mid woofer for smooth, wide-range response with low distortion and a 3/4" Amiable silk dome tweeter with a powerful neodymium magnet structure for clear, detailed highs a...

Made with heavy duty outer polyester webbing and a polyester core specifically sewn in to reduce impact forces; does not stretch and has no shock pack; lightweight.

Optima D34M BlueTop is designed as a dual purpose battery, both starting and deep cycle for people who need a sure-starting, strong cranking, and maintenance free power source for their boat or RV, even in harsh conditions. The unique SpiralCell design provides a strong and clean power source, ensur...

Optima D34/78 YellowTop battery provides the extra performance and deep-cycling capability that your vehicle demands if it has a lot of accessories like running lights, high-performance stereo/AV system, winches, or hydraulics. The unique SpiralCell design provides a strong and clean power source, e...

Gauges and Gaps all Types of Spark Plugs from .020" to .100" (.50mm to 2.53mm). Tapered edge for gauging spark plugs. Specially designed hole with flange adjusts side wire of plug without pressuring center electrode.

The Pound-series precision scale features a compact design with a large removable weighing bowl. The large, easy to read, back lit LCD helps you obtain results quickly and reliably.

Long lasting alkaline power cells

Polk Audio db651s Slim-Mount 6.5" Coaxial Speakers comes with the new slim mount design with a short tweeter post .The polymer/mica composite mineral filled cone is stiff yet lightweight and brings big sound with little distortion