The Barwalt 1/4" + Hollow Leave-In Tile Spacers are designed for professional tile installers seeking a time-saving, efficient solution for achieving consistent grout joints. These spacers are hollow-core, allowing grout to flow through and fully fill the joint, eliminating the need for post-installation spacer removal. This enables earlier grouting—often a day sooner—streamlining the tiling process. Made from a compressible rubber blend, these spacers can flex up to 10% to accommodate minor tile size variations, ensuring a smooth, lippage-free finish. Their extended length provides added stability when working with radius corners or uneven tile edges. The "+" shape promotes even alignment in both directions, ideal for standard grid layouts.