121.11—Military demolition blocks and blasting caps.
Military demolition blocks and blasting caps referred to in Category IV(a) do not include the following articles:
(b)
No. 6 and No. 8 blasting caps, including electric ones.
(c)
Delay electric blasting caps (including No. 6 and No. 8 millisecond ones).
(d)
Seismograph electric blasting caps (including SSS, Static-Master, Vibrocap SR, and SEISMO SR).
(e)
Oil well perforating devices.