Check the listing for details. Polaris RZR Rear Insulated Cooler Box 23 Quart for Pro R, Pro XP, Pro XP 4,. Color: Black, Condition: New. Listed at 329.99 USD. We'd like to introduce you to your new best friend on the trails, the Lock & Ride 23 Quart Rear Cooler Box. Whatever your favorite outdoor food and beverages are, keep them ice cold on even the longest of rides. Rubber latches tightly fasten the lid, locking out dust and water and keeping your cargo protected in all environmental conditions. The drain plug is located on the back of the cooler. This portable cooler is compatible with Polaris 73 Quart Forward Cargo Box (PN 2883751). Designed and tested by Polaris Engineers to ensure durability and quality through hundreds of hours and thousands of miles of field, lab and validation testing.We'd like to introduce you to your new best friend on the trails, the Lock & Ride 23 Quart Rear Cooler Box. Whatever your favorite outdoor food and beverages are, keep them ice cold on even the longest of rides. Rubber latches tightly fasten the lid, locking out dust and water and keeping your cargo protected in all environmental conditions. The drain plug is located on the back of the cooler. This portable cooler is compatible with Polaris 73 Quart Forward Cargo Box (PN 2883751). Designed and tested by Polaris Engineers to ensure durability and quality through hundreds of hours and thousands of miles of field, lab and validation testing.