Grt 1/2
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 5835-01-416-6455
NSN 5950-01-260-7805
NSN 6130-01-415-8162
NSN 5905-01-381-2431
NSN 5960-00-256-3622
NSN 5990-01-517-7848
NSN 5999-00-723-4303
NSN 6320-00-082-5868
NSN 5998-01-213-8855
NSN 6150-00-666-3635
NSN 6105-01-506-5260
NSN 5915-01-100-3729