The 1/4" x 1-1/8" x 4" EPDM Rubber Setting Blocks are designed for glazing applications to support glass panels in window and door hardware installations. Constructed from EPDM rubber, these blocks provide a resilient cushion for glass, helping it withstand vibration, shock, and temperature fluctuations. These blocks are suitable for use with laminated glass, including those with PVB interlayers. The EPDM rubber composition offers resistance to weather and ultraviolet rays, making them suitable for various environmental conditions. Each block measures 1/4" in thickness, 1-1/8" in width, and 4" in length. These blocks feature an 80 durometer hardness for structural support. When using these blocks with silicone sealants, be aware of the potential for color bleed-through. The black finish provides a neutral appearance in window and door installations. These setting blocks are used to support glass panels, helping them withstand heavy wind loads and temperature changes. They are supplied as individual units for use in professional glazing and construction projects.