Niche Front Rear Brake Pad Set for Polaris Ranger 500 570 800 2205949 2203747 1911228 Organic 4 Pack

4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5.

4 is the smallest square number > 1, the smallest semiprime and composite number, and the 3rd highly composite number.

The number 4 is considered unlucky in many East Asian cultures.

Year 570 (DLXX) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. The denomination 570 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Year 800 (DCCC) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar, the 800th year of the Common Era (CE) and Anno Domini (AD) designations, the 800th year of the 1st millennium, the 100th and last year of the 8th century, and the 1st year of the 800s decade. It was around this time that the Anno Domini calendar era became the prevalent method in Europe for naming years, so from this time on, the years began to be known as 800 and onwards.

A brake is a mechanical device that inhibits motion by absorbing energy from a moving system. It is used for slowing or stopping a moving vehicle, wheel, axle, or to prevent its motion, most often accomplished by means of friction.

Organic may refer to:

• Organic, of or relating to an organism, a living entity
• Organic, of or relating to an anatomical organ

Polaris is a star in the northern circumpolar constellation of Ursa Minor. It is designated α Ursae Minoris (Latinized to Alpha Ursae Minoris) and is commonly called the North Star or Pole Star. With an apparent magnitude that fluctuates around 1.98, it is the brightest star in the constellation and is readily visible to the naked eye at night. The position of the star lies less than 1° away from the north celestial pole, making it the current northern pole star. The stable position of the star in the Northern Sky makes it useful for navigation.

As the closest Cepheid variable its distance is used as part of the cosmic distance ladder. The revised Hipparcos stellar parallax gives a distance to Polaris of about 433 light-years (133 parsecs), while the successor mission Gaia gives a distance of about 448 light-years (137 parsecs). Calculations by other methods vary widely.

Although appearing to the naked eye as a single point of light, Polaris is a triple star system, composed of the primary, a yellow supergiant designated Polaris Aa, in orbit with a smaller companion, Polaris Ab; the pair is in a wider orbit with Polaris B. The outer pair AB were discovered in August 1779 by William Herschel, where the 'A' refers to what is now known to be the Aa/Ab pair.

A ranger is typically someone in a law enforcement or military/paramilitary role specializing in patrolling a given territory, called "ranging" or "scouting". The term most often refers to:

• Park ranger or forest ranger, a person charged with protecting and preserving protected parklands and forests.
  • National Park Service ranger, an employee of the National Park Service
  • U.S. Forest Service ranger, an employee of the United States Forest Service
  • Ranger of Windsor Great Park, a ceremonial office of the United Kingdom
  • Includes the Keepers of Epping Forest who are charged to Range about the Forest in their duties.

Ranger or Rangers may also refer to: