Two sets of Shims and Extensions offer the option to create height-adjustable work surfaces.
- 6-pc set of Shims
- 14-pc set of Shim and Extension
All shims have 28 mm inner diameter and 50 mm outside diameter.
T28-570030 is a 30 mm Prism Extension for quickly and securely screwing in all prisms and enables positioning of the prism at different heights in combination with shims.

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