Document Description File Type Size iosp-20200506.xsd XBRL Taxonomy Extension Schema EX-101.SCH 3 KB iosp-20200506_lab.xml XBRL Taxonomy Extension Label Linkbase EX-101.LAB 18 KB iosp-20200506_pre.xml XBRL Taxonomy Extension Presentation Linkbase EX-101.PRE 11 KB d916920d8k_htm.xml XML 3 KB