The Stanley Yellow Level 16 400 mm is an I-beam shaped box with high visibility tubular side vial perfect for making the consistent and accurate reading of measurements. The precision level of this vial is up to - 0.5 mm. Thanks to the highly durable and lightweight frame with shock-absorbing caps, makes it a better-quality tool that will last for years to come. It is easy to clean and maintain. The total dimension of the product is 23 mm (H) X 48 mm (W) X 400 mm (L). Highly durable and lightweight frame with shock-absorbing caps. Ideal for taking accurate reading of dimensions. Comes in a rugged aluminium I-Beam box shape. The total dimension of the product is 23 mm (H) X 48 mm (W) X 400 mm (L)