Lumps API Grade Chapter 13: Typical performance of BENTONITE API 13A when tested as per API 13A section 4 is as follows: Properties Specifications Viscometer Dial reading at 600rpm 32-40 Yield point/plastic viscosity ratio 2-3 Failtrate volumer (in cc) 13.5-15.0 Moisture % 9.5-10.0% Residue greater than 75 micron (200 mesh) wer analysis 1.0-3.0% However, Customised specifications as per buyer requirement can also be made. Packaging: Jumbo Bags Application: Crude