Check the listing for details. BAL RV 1/2" Wear Bar Slide-Out Base Roller Assembly 854304 (HP15). Condition: New. Listed at 15.99 USD. Model854304FitsUse With BAL Accu-Slide1/2" Wear BarFeaturesAn upgrade replacement for a 1/2" wear barRollers help to ensure proper operation of your RV slide out.A Heavy Duty Wear BarBlack powder coat finished steel mounting bracket.White Nylon Roller ConstructionIncluded(1) Base Roller AssemblyDimensionsRoller Each: 1/2" I. D. x 1" O.D. x 2-1/8" WOverall Bracket: 4-5/8" W x 1-7/8" L x 1-7/8" HWear Bar: 1/2" Instructions for installation: GDS.SLD_.025-ACCU-Slide-Roller-Installation-for-Crushed-Wear-Bear-REV-B.pdf (balrvproducts.com) Let us help you get back on the road and making memories. All parts are guaranteed to be in working condition. Let us know if you have any questions. Thanks!! We Only ship within the United States EXCLUDES HAWAII, ALASKA OR PUERTO RICO. No international shipping. Thanks For shipping outside the United State, HAWAII, ALASKA OR Puerto Rico you will need to message so we can work out any additional shipping cost. Shipping outside of the United States, Puerto Rico will be on a case-by-case basis.