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 6240-01-530-0438
NSN 7035-00-535-8109
NSN 5950-01-135-6818
NSN 5935-01-081-4384
NSN 5855-01-225-5855
NSN 5835-00-816-0394
NSN 5925-01-462-5933
NSN 5905-01-290-7814
NSN 5935-00-064-4018
NSN 6610-01-331-4174
NSN 5950-01-489-7054
NSN 5925-01-567-1580