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 5945-01-604-8977
NSN 6240-01-054-2289
NSN 5835-01-557-9062
NSN 6150-01-422-6944
NSN 5935-01-441-9013
NSN 5996-01-482-7596
NSN 5985-01-438-1058
NSN 5945-00-454-7179
NSN 5895-00-269-2697
NSN 5985-01-422-2552
NSN 6620-01-290-2973
NSN 6320-01-592-6248