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 6145-01-659-5994
NSN 6320-01-600-5808
NSN 6610-01-027-0087
NSN 6130-00-707-7732
NSN 5999-01-422-6836
NSN 6220-01-454-6541
NSN 6610-01-102-2256
NSN 5996-01-646-7872
NSN 5925-01-369-9526
NSN 5975-00-185-5243
NSN 5895-01-383-3862
NSN 5910-01-581-4470