Features1. Applicable Model: The rear brake master cylinder is a replacement for Polaris Magnum, Scrambler, Sport, Sportsman, Trail, Worker, Xpedition, and Xplorer models. Please confirm compatibility with your vehicle before purchasing to avoid returns.2. OE Number: Reference part numbers include 1910301, 1910311, 1910791, 1910790, 1911113. Replacement part number is 1930899. Verify compatibility with your original equipment to prevent incorrect purchases.3. High Performance: The brake master cylinder assembly prevents fluid bypass, ensuring sturdy, safe, and reliable operation. Improves stability and durability for your ATV.4. Premium Material: Constructed from durable ABS and metal materials, the rear brake pump resists damage, offers high strength, and is rust resistant for long-term use.5. Convenient Installation: Includes a fluid reservoir and a long hose for complete and secure rear brake system setup, reducing installation time and effort.SpecificationItem Type: Rear Brake Master CylinderOE Numbers: 1910301, 1910311, 1910791, 1910790, 1911113Replacement OE Number: 1930899Fitment: Replacement for Polaris ATVs including:- Diesel 455 (1999–2001)- Magnum 325 (2000–2002)- Magnum 330 (2003–2006)- Magnum 500 (1999–2003)- Scrambler 400 (1998–2002)- Scrambler 500 (1998–2009)- Sport 400 (1999)- Sportsman 335 (1999–2000)- Sportsman 400 (2001–2005)- Sportsman 450 (2006–2007)- Sportsman 500 (1998–2009), excluding 6x6, X2, Touring- Sportsman 600 (2003–2005)- Sportsman 700 (2002–2007)- Sportsman 800 (2005–2008)- Sportsman MV7 (2005)- Trail 250 (1999–2006)- Trail 330 (2008–2009)- Trail 400 (2003)- Trail 325 (2000–2002)- Trail 330 (2003–2009)- Worker 335 (1999)- Worker 500 (1999, 2001)- Xpedition 325 (2000–2002)- Xpedition 425 (2000–2002)- Xplorer 250 (2000–2002)- Xplorer 400 (1999–2002)Package List1 x Rear Brake Master Cylinder2 x Screws3 x GasketsNotePlease verify the part number of your original unit. Compatibility information is provided for reference only.