Specification Brand : Electron Microscopy Sciences BulletPoint : Square, Grid, Scales BulletPoint1 : 78 mm (L) x 65 mm (W) x 6.5 mm (D) BulletPoint2 : The clear cover can be rotated smoothly through 360 degrees once the slight initial resistance of the park position has been overcome exposing a maximum of 2 or 3 diamond shaped slots at any one time BulletPoint3 : Cover has self-lubricating properties, which reduces friction, enabling the cover to move freely while remaining in close contact with the face of the base BulletPoint4 : The storage boxes are designed to be stacked, the base locating precisely over the face of another box ItemName : NE34 Graticule, 21 mm ItemPackageQuantity : 1 ItemTypeKeyword : science-lab-carts Manufacturer : Electron Microscopy Sciences ModelNumber : 68018-21 NumberOfItems : 1 PartNumber : 68018-21 ProductDescription : Simple grids are convenient for making sketches of the obseved specimen on graph paper, they are also useful for particle counting. Surface chrome image. Grid (net) 0.1mm squares. ProductSiteLaunchDate : 2014-05-02T18:21:07.099Z Size : 12 BX Style : SB50N