4 circular cavities, each 12.5mm across. Black background. Depth 2mm. 

Waterproof cardboard slides with a glass cover and aluminium holder. 

Slides made from acid-free conservation board with a special coating to hold water on the surface, so that they do not deform under wet conditions. Glue resistant to mechanical force and humid conditions. No static electricity buildup due to cardboard and glass construction (as opposed to plastic). 

Other styles available upon request. Please email your requirements to info@zoicpalaeotech.co.uk