TM 10-6640-215-13 SECTION II.  EXPENADABLE/DURABLE ITEMS LIST - continued 120 C 6640-00-438-5950 ROD ASSORTMENT, STIRRING, EA LABORATORY: Soft glass, 1 ft. Ig, or 4, 6, and 8 mm dia, fire polished ends (81348) NNN-R-560, Type I 121 C 6640-00-103-8961 SAND, SEA: 5 lb.  pkg OZ (64484) S-73845A 122 C 6640-00-063-5240 SCRAPPER, LABORATORY EA RUBBER: Diagonal, pure gum rubber, 1-3/8 in. Ig, 7/16 in.  w, 1/8 in.  dia rod (22527) P/N 14-105A 123 C 6640-00-410-4463 SCRAPPER, LABORATORY EA RUBBER: Diagonal, 25 mm Ig, 3.15 mm dia. 152.4 mm lg glass rod (21519) No.  74-800 124 C 6810-00-233-0126 SILVER NITRATE, ACS. OZ Crystal, 1/4 lb.  bottle MIL-STD-1218 (81348) O-C-265 125 C 6810-00-241-1143 SODIUM BICARBONATE, ACS: OZ Crystal, I lb.  bottle MIL-STD-1218 (81348) O-C-265 126 C 6810-00-264-6593 SODIUM BICARBONATE, AN- OZ HYDROUS, ACS: Granular, 1 lb.  bottle MIL-STD-1218 (81348) 0-C-265 127 C 6810-00-264-6592 SODIUM CHLORIDE, ACS: OZ Crystal, 1 lb.  bottle MIL-STD-1218 (81348) O-C-265 E-15 (1) Item Number (2) Level (4) Description (5 U/M (3) National Stock Number