# Extension

Ordering No. | Length | Thread | Remarks
--- | --- | --- | ---
4141 0901 00 | 51 mm (1.5") | 1"-20 UNF | Compatible with standard indexer and front part 4141 0899 92.
4141 0902 00 | 52 mm (1.5") | 1 9/16"-20 UNF | Must be used with HD indexer and front part 4141 0899 93.
4141 0902 01 | 77 mm (2.5") | 1 9/16"-20 UNF | Must be used with HD indexer and front part 4141 0899 93.
4141 0902 02 | 103 mm (3.5") | 1 9/16"-20 UNF | Must be used with HD indexer and front part 4141 0899 93.