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 5920-01-558-6639
NSN 5950-01-137-8550
NSN 5999-01-004-8270
NSN 5996-01-281-7336
NSN 2925-00-010-9609
NSN 2925-01-058-1718
NSN 6685-01-546-5163
NSN 5905-01-348-9921
NSN 5945-01-448-9742
NSN 6220-01-308-0414
NSN 5855-01-541-8659
NSN 5905-01-573-7437