ACHIEVE CLEAN, PROFESSIONAL INSTALLATION: This 48" perimeter channel creates a secure, straight foundation for 4" glass block walls, delivering a polished finish to showers, partitions, windows, and room dividers. BUILT FOR DURABILITY & STABILITY: Constructed from rigid white extruded vinyl, the channel provides long-lasting structural support for both residential and commercial glass block applications. FAST, EASY INSTALLATION: Pre-drilled holes allow quick attachment to framing, reducing installation time and ensuring precise alignment for a seamless glass block layout. FLEXIBLE, CUT-TO-FIT DESIGN: Can be trimmed to any opening size, making it ideal for custom projects or irregular wall dimensions. COMPATIBILITY NOTE: Designed specifically for 4" thick glass blocks. Ensure block thickness matches channel to avoid installation issues. The Seves Glass Block 4" × 48" Perimeter Channel is an essential accessory for creating secure, professional-looking glass block installations. Designed for 4" standard-thickness units, this channel provides the stability and alignment required for high-quality results in showers, windows, bars, walls, and decorative partitions. Crafted from rigid extruded vinyl, it offers durability, resistance to moisture, and long-term dimensional stability—perfect for bathrooms and other demanding environments. Pre-drilled holes simplify mounting, while the 48" length can be easily cut to fit any opening, giving installers maximum flexibility for both small and large projects. Whether you're building a full glass block wall or adding architectural accents, this channel ensures your blocks sit securely and evenly. This installation channel is intended exclusively for 4" thick glass blocks, helping prevent sizing mismatches or return issues.