One commonly used lubricant in rolling bearings is grease. which consists of base oil. thickener and small amounts of additives. Commercial greases are mostly produced from petrochemical base oil and thickener. https://www.bekindtopets.com/discount-Ancient-Roman-Gladiator-Murmillo-Cassis-Crista-Helmet-With-Medieval-Style-Skullcap-Nasal-Helmets-With-Nose-Guard-3-Re-big-savings/