Durst Sivoma 45 film format mask

Durst Sivoma 45 film format mask.   Suitable for 6x4.5cm film format - this fits into the lower section of the negative carrier . It is used in conjunction with either a Durst Sixgla glass insert / Durst Sivogla an glass insert (none included) which fit into the upper section of the negative carrier. The mask is in excellent condition - clean and checked. These can be used with the Durst m370 / m605 / m670 / ac650 / m707 / ac707  enlargers and possibly others