b'Spark Blocks.These square shaped blocks are great to Spark conversations with your patients. Place them strategically around your office to inform patients of various eye care options available to them to fit their needs and concerns. Sold as a set of 8 blocks with 8 stock inserts.- Ask us about the benefits of Premium Lenses! - Does glare bother you while driving at night with your glasses on? - Does bright sunlight bother you while driving? - Why should you consider a UV coating on your lenses? - Do you spend more than 3 hours a day on an electronic device? - Do you want the very best vision possible with your eyeglasses? - Have you forgotten your sunglasses when you really needed them? - Does the weight and thickness of your eyeglasses bother you?D320SIZE - 4W x 4H128 | SPARK BLOCKS'