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 5925-01-561-8839
NSN 6685-00-319-1685
NSN 5990-01-097-4721
NSN 5905-01-305-1422
NSN 5930-01-283-9116
NSN 5985-01-215-1677
NSN 6220-01-056-8792
NSN 6685-01-047-5139
NSN 5905-00-823-7796
NSN 5996-01-211-8067
NSN 6135-01-090-5365
NSN 5996-01-229-7434