A light, coarse stone of volcanic origin, which consists of silicate of aluminum, sodium and potassium.
Classification: Pumice, except crude or crushed, whether or not heat-treated
NSN 5985-01-561-1007
NSN 6320-00-731-6134
NSN 6645-00-754-4108
NSN 6650-00-690-5840
NSN 6320-00-405-2348
NSN 6650-00-113-7698
NSN 5996-01-607-7035
NSN 6110-01-545-1029
NSN 6135-00-958-7981
NSN 5945-01-046-3801
NSN 6685-00-707-4842
NSN 6620-01-067-8336