UMBK-280 Base Sphere
280 mm / 11" inner diameter ODM98 coated basic sphere for use with optional post mount socket, stand and other Gigahertz-Optik accessory components.
UMBK-280-M Base Sphere with Flange Mount
280 mm / 11" inner diameter ODM98 coated base sphere with assembled UMSS-SMT flange mount set for use with optional accessory components
UMBK-280-BT Base Sphere with Stand
280 mm / 11" inner diameter ODM98 coated base sphere with UMSS-BT-300 bench top stand for use with optional accessory components.