This Gardner Instruments Gardner Laboratory standard is perfect for measuring the reflective properties of specular glass in black and white. Made with high-quality materials, it ensures accurate results every time. The Type 75-834-W is a reliable tool that can be used in various industries such as manufacturing and construction. The brand name Gardner Instruments is known for its precision and durability, and this laboratory standard is no exception. It is an ideal choice for those who require exact measurements in their line of work. Whether you're a seasoned professional or just starting out, this Gardner laboratory standard is a must-have tool for your collection.