This coplin jar allows complete submersion of slides during staining or washing. Has 4 grooves within the jar to separate each slide. Each groove allows for 2 slides to be placed back to back Coplin jar has threaded screw top and is autoclavable Coplin jar can hold 10 1" x 3"slides back-to-back Coplin jar measures approx. 4.50" tall , 2.36" top and bottom diameter Made of durable polypropylene This listing is for 12 coplin jars. These coplin jars allows for complete submersion of slides for staining. Each jar has 4 grooves within the jar to separate each slide and hold them upright. Each groove allows for 2 slides to be placed back to back. Coplin jar has threaded screw top. Autoclavable Dish will hold 5 (10 slides back to back) slides that measure 3" x 1" slides (75x 26x 1.3mm) Coplin jar measures approx. 4.50" tall , 2.36" top and bottom diameter. Made of Polypropylene. This coplin jar allows for complete submersion of slides for staining. Made of Polypropylene. Autoclavable.