Premiere Series Specialty Glass Block- VISTABRIK® CORNER Solid Glass Block VISTABRIK® CORNER Solid Glass Block Available Sizes Description 8" x 8" x 3" Slight radius for corners or angles. Clear visibility, durable, impact, vandal and bullet resistant, low maintenance and aesthetically attractive. Excellent light transmission. The Vistabrik corner uses 2 blocks to turn a 90 degree corner with an inside radius of 8.25 inches and an outside radius of 11 inches.