eBay

Zeiss 90° Prism 11.9x8.5x8.4mm

These authentic and original optical parts come directly from a surplus (close-down business in Germany). Great for DIY and research projects.

Purpose: Carl Zeiss manufacturing process (several sources involved, including Schneider Kreuznach).
Measures: (see pics)
Thickness (T): 8.95mm
Coating: yes
Optical standard: unknown (most probably BK-7 substrat).
Brand: Zeiss.
Class A: Overall excellent with no discernable flaws. Please, see pics.

All USA shipping is now DDP: all import duties/tariffs included paid in advance so that you won't pay additional taxes (this only applies to "international economy shipping" sent to be received through Post Office, not UPS or FEDEX).