The Dometic Patio Awning Door Roller installs easily on RV doors to prevent damage to an extended awning. This awning door guard is intended for use with the Dometic Optima Tension Rafter System. Constructed with precision for optimal performance and reliability.• Protects awning fabric from damage• One guard per pack• Precision construction Intended for use with Dometic Optima Tension Rafter System Precision construction for reliable performance | Dometic Patio Awning Door Roller Package