Delta Blinds Supply Custom-Made, Premium Real Wood Horizontal Almost White Window Blinds, 2 Inch Slats, Inside Mount NO SIZE SELECTED: Please re-order or contact Amazon Customer Service for assistance. ***IMPORTANT: MEASURING INSTRUCTIONS: To ensure you receive the correct size blinds please only use our measuring instructions for guidance (second photo on this page.) QUALITY: Warp-Proof in non-humid rooms; Lightweight Hardwood MATERIAL: 100% Premium kiln dried basswood from northern United States. CERTIFICATIONS: Greenguard Air Control and Greenguard Schools & Children FUNCTION: Heavy-duty components for smooth operation, higher load capacity, and enduring performance.