50mm extender for 48.5mm microscope dovetail mount

• Front side - 48.5mm dovetail, male
• Rear side - 48.5mm inner diameter
• Length - 50mm (plus dovetail part)
• Weight - 73g

Such extender enables using 210mm tube length M Plan objectives (from Nikon or Olympus, for example) on 160mm tube length microscopes.

48.5 mm dovetail is for Nikon Optiphot/Labophot, which are very popular scopes in USA.

Made of durable aluminium alloy.