P6 Hopper - Pre-Grouping: NER Grey - Triple PackP6 Hopper 1901 1904 Pre Grouping: NER Grey Triple Pack 8 plank, 15 ton Diagram P6. Two types of end stanchion tooled: NER wooden or LNER metal T bar type from 1925 onwards. After 1926, the bottom sections of any remaining wooden stanchions were removed. Side chains were fitted to NER Northern Division examples until 1916 and have been catered for. Five types of axle box: 3A Grease, Iron Oil S1 (9" x 4. 25"), Iron Oil S2 (9. 5" x 4. 25"), No. 3 (10" x