One-piece glassless snap-down slide mount, 5 x 5 cm (2 x 2 in.),  for 35-mm slides. 

Automatic mounting with Kaiser diamount C.A.M./CS slide cutters and mounters, Reflecta Servicemaster CS 2 and Braun Paximat Automount - now discontinued but you may have one or can find a used one, or the  AP Pro Mounter 35mm Slide Mounting Machine

Also for manual mounting. 
Clamping strip to secure and accurately position the transparency. Guide rail for exact position of the transparency during automatic mounting. Mount thickness 1.8 mm (0.07 in.). For CS, LKM and Paximat Compact magazines. 

The AP 35mm Slide Mounts are made of durable plastic and can be used for mounting any type of 35mm transparency. They can close by simply pressing around the sides of the mount and re-opened with a conveniently-positioned fingernail groove. Four internal pins ensure correct slide placement.

The mounts are for the CSII slide Trays, magazines & Carousels