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 6110-01-596-4912
NSN 2925-01-430-4206
NSN 6620-01-519-2628
NSN 5925-01-166-7261
NSN 6650-01-313-7460
NSN 5990-01-128-7599
NSN 6220-01-104-6861
NSN 5945-01-527-0936
NSN 4140-01-121-3980
NSN 6620-01-254-3609
NSN 6650-01-659-4609
NSN 5920-01-260-3571