Looking for reviews? This page represents a group of products, but many of the reviews of those products are on their individual product pages. Search for the product name to find individual products and read their reviews.These six spring scales are perfect for demonstrating how gravity and mass determine weight. Each scale is marked in both grams and Newtons so you can choose the measurement that is right for your lab! There are a range of possibilities when using these spring scales since the smallest scale measures up to 250g or 2.5 N while the largest measures all the way up to 5000g or 5 N. Each scale is a different color so it is easy to find the right scale for your measurement. The scales come equipped with a dial on top that allows you to "zero" the scale to adjust for accuracy and clear casing so you can see spring tension.