Document Description File Type Size iosp-20210216.xsd XBRL Taxonomy Extension Schema EX-101.SCH 3 KB iosp-20210216_lab.xml XBRL Taxonomy Extension Label Linkbase EX-101.LAB 18 KB iosp-20210216_pre.xml XBRL Taxonomy Extension Presentation Linkbase EX-101.PRE 11 KB d949590d8k_htm.xml XML 3 KB