Seves 4 in. Thick Series Arctic pattern 8 in. x 8 in. x 4 in. individual glass blocks (8-pack) combine beauty, performance, and practicality in a material that permits the flow of room brightening light. Individual square, rectangular and specialty shaped blocks made of genuine, high quality glass are available in a large selection of sizes and patterns allowing you to choose the level of privacy you want while maximizing light transmission. Durable and secure, glass blocks' properties lend style and privacy while also helping to muffle sound. Individual 4 in. Thick Series glass block may be combined with other Seves 4 in. T Series glass blocks and Seves glass block 4 in. Thick Series installation accessories to build enhanced security and privacy windows for basements, bathrooms, kitchens, garages, transoms, door sidelights, offices and much more. Used in partitions, shower walls, exterior walls, curtain walls and room dividers, glass block permits room brightening light to travel from 1 space to another while letting you select the level of privacy you want.