Elevate your glass block window installations with these premium 10-pack spacers. Compatible with 3-inch glass blocks, these versatile spacers ensure both horizontal and vertical alignment for a clean and professional appearance. Constructed from high-quality, rust-proof PVC material, these spacers are built to withstand the test of time, while their lightweight design makes them easy to handle and maneuver. The dry-run compatibility feature allows for precise glass block placement prior to applying mortar, ensuring a perfect fit every time. Ideal for home improvement projects or professional installations, these spacers make glass block window projects quick, simple, and enjoyable. Experience the satisfaction of a successful DIY installation with these reliable and easy-to-use glass block window spacers!