lasuroa 4pcs Sliding Screen Door Rollers for M-Shaped Tension Springs, Smooth & Quiet Operation 1" Concave Screen Door Replacement for B512 B513 B746

• Complete 4 Pack Solution: Includes all necessary rollers for full door maintenance, ensuring consistent smooth operation and eliminating the need for multiple purchases.
• Precision-Engineered for Silent Gliding: These 1" steel ball bearing rollers ensure smooth, noise-free operation of your sliding screen doors, compatible with Columbia and Uni-Fit series (B512/B513/B746 replacements).
• Universal Compatibility: Designed to fit most M-shaped tension spring systems, these heavy-duty rollers work with various sliding screen doors and patio doors for versatile home improvement solutions.
• Durable Steel Construction: Made with premium concave steel ball bearings and stamped steel bodies for long-lasting performance, resisting wear and tear from frequent door movement.
• Easy Snap-On Installation: Simply attaches to existing die-cast door frames, it is recommend replacing all 4 rollers (top & bottom) simultaneously for optimal door performance.

Specification: Color: as shown in the picture Material: steel Product Size: 6.5x6.5x1cm/2.56x2.56x0.4in Package details: 4 x sliding screen door rollers Note: Due to manual measurement, the size and weight may have a certain error. Due to the difference between different monitors, there may be a slight color difference existed.