This is the second edition of John Zelle's Python Programming, updated for Python 3. This book is designed to be used as the primary textbook in a college-level first course in computing. It takes a fairly traditional approach, emphasizing problem solving, design, and programming as the core skills...

This Dixon FBVG50 ball valve is made of forged brass for higher corrosion resistance than steel and has a plastic-covered lever handle for on/off manual control. This inline valve has a full port flow for higher operating efficiency than standard port and 1/2" female National Pipe Taper (NPT) thread...

This Valterra 200-15W check valve is made of white schedule 40 (standard wall) PVC for corrosion resistance, high strength, and less weight than fittings made from metal. It is compatible with schedule 40 PVC (polyvinyl chloride) pipes and fittings or can be connected to other materials such as stee...

In 1959, Charles Bennett invented the first adjustable trim tab, dramatically improving a boat's performance in an expanded range of conditions. Having earned a reputation for exceptional durability and reliability, Bennett Trim Tabs can be found on boats all over the world.

This Dixon SE series 90 degree elbow is used for changing flow direction. It has male and female National Pipe Taper (NPT) threads for connecting female threaded pipe to male threaded pipe. It is made of brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability....

This Pentek R50 pleated polyester filter cartridge reduces sand, dirt, silt, rust, and scale particles in residential and commercial water. It has a nominal filtration rating of 50 microns at an efficiency of 85%. The filter is made of resin-impregnated cellulose and polyester media pleated around a...

Six rust resistant spring steel clamps hold tablecloths in place in high winds. Fits most table thicknesses.Coghlan's Ltd. is recognized as the world leader in outdoor camping accessories. Founded in 1959; Coghlan's is a family owned company and has built its reputation on core values of product qua...

The ideal solution for emptying marine holding tanks when not in a discharge restricted area.It is recommended that holding tanks be flushed with several gallons of water after each pump out. This will reduce the possibility of a continued build up of sediment in the tank which could cause a potenti...

This Pentek PD-5-20 polypropylene filter cartridge reduces sand, silt, scale, and rust particles in commercial drinking water and industrial fluid applications. It has a nominal filtration rating of 5 microns at an efficiency of 85%. The filter is made of thermally bonded polypropylene microfibers f...

The Forney 75533 reducer adapter male NPT 3/8-inch X 1/4-inch male NPT is an all brass hose reducer. Use to connect air hose to air hose. Resists rust and will not corrode as easily as other materials. Forney Industries is one of America's longest operating family-owned metal working product compani...

This Precision Brand Micro Seal Miniature Series stainless steel worm gear clamp is used to attach fittings to hoses. The clamp's band is made from series 300 stainless steel to help provide resistance to corrosion in marine environments, and a plated carbon steel screw resists rust. The 5/16" band...

• Waterproof • Tear-Resistant • Topographic MapLocated just off the California shore, the Channel Islands are home to many unique species of flora and fauna. National Geographic's Trails Illustrated map of Channel Islands National Park covers with unparalleled detail the five islands that encompass...