https://www.jwfg.com/products/shutters/ All Types of Window Shutters * Shutters Openness Factor: 5% Shutters Openness Factor: 3% Shutters Openness Factor: 1% * Shutter Maintenance Tips for Longevity and Performance * TIPS 1 Clean Regularly: Dust weekly and use a damp cloth with mild soap for deeper cleaning. TIPS 2 Lubricate: Apply silicone-based lubricant to hinges and moving parts to ensure smooth operation.All Rights Reserved