47mm size recommended for use with 09-753-1A Filter Holder in filtering highly granular samples or those with <10% solids 90mm size recommended for use with 09-753-2 Filter Holder with highly granular samples 142mm size provides four times the filtration area of 47mm filters (ideal for samples with >10% solids); recommended for use with 09-753-25J Filter Holder with reservoir Compliance Meet U.S
EPA requirements for Toxicity Characteristic Leaching Procedure (TCLP).