The Stanley Classic Level 24" 600 mm is a magnified center block vial that allows you to take a reliable, consistent and accurate reading of dimensions. The accuracy level of this vial is up to +- 0.5 mm. Thanks to the highly durable and lightweight frame with shock-absorbing caps, makes it an improved tool that will last for years to come. It comes in a rugged aluminium I-Beam box shape. The total dimension of the product is 60 x 2.4 x 4.8 cm. Perfect for taking accurate reading of dimensions. Highly durable and lightweight frame with shock-absorbing caps. Comes in a rugged aluminium I-Beam box shape. The total dimension of the product is 60 x 2.4 x 4.8 cm.