This 20-slide unit is the standard for manual staining procedures. The removable glass slide rack has an open bottom to facilitate rapid immersion and drainage, reducing carryover. The rack holds 10 single slides, 19 slides arranged alternately straight across and diagonally, or 20 slides back-to-back of standard size: 3" x 1" (75 x 25 mm), 3" x 1-1/2" (75 x 38 mm) and 3" x 2" (75 x 51 mm) sizes. Manufactured from soda-lime glass. Approximate inside dimensions: 95 mm L x 76 mm W x 64 mm D.