The RZR 1000/900 Full Roof Rack for 4-Seat UTVs is engineered to work with aluminum roofs and without roofs. It doesn't currently work with plastic roofs. It's lightweight, aluminum structure offers great strength and durability, with a low-profile design that matches the RZR body style perfectly. Multiple cross bars with drop points offer lots of mounting and accessory options, including a wind deflector with 30 inch light bar cut out. With ultimate versatility, this is a roof rack that can carry almost anything you need on your next trail ride. Fits all 2014-Current Polaris RZR XP 1000, 2016-Current Polaris RZR XP Turbo, 2017-2020 Polaris RZR 4 900 / S4 900 / S4 900 Works with aluminium roof and without a roof Not Compatible with Plastic roofs at this time