Plastic Line Blocks by Marshalltown Tools Save Liquid error (product-badge line 32): Computation results in '-Infinity'% $4.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart MARSHALLTOWN Line Blocks make it easy to maintain a straight line. Waterproof yellow Plastic Line Blocks. The MARSHALLTOWN Line Blocks are Made in the USA with Global Materials. Maintain a straight line Made in the USA with Global Materials ITEM ID: 16508