This Allstar Performance camshaft thrust button is machined from steel with a black oxide finish and measures 0.790in long. It is designed for Small Block Chevy engines running a roller camshaft.Spec Sheet: Allstar Spec SheetCompatibilityENGINE-SPECIFIC: Small Block Chevy, roller cam version (steel, distinct from ALL90052's aluminum flat-tappet-style button despite similar length).FAQ What length is the ALL90054 thrust button?The ALL90054 measures 0.790in long. What engine and cam type does the ALL90054 fit?The ALL90054 is designed for Small Block Chevy engines running a roller camshaft. What is the ALL90054 made from?The ALL90054 is machined from steel with a black oxide finish. Is the ALL90054 the same as the ALL90052?No. Despite similar lengths (0.790in vs 0.795in), the ALL90054 is a steel roller-cam button while the ALL90052 is an aluminum flat-tappet-style button. They are built for different camshaft types and are not interchangeable. {"@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{"@type": "Question", "name": "What length is the ALL90054 thrust button?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90054 measures 0.790in long."}}, {"@type": "Question", "name": "What engine and cam type does the ALL90054 fit?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90054 is designed for Small Block Chevy engines running a roller camshaft."}}, {"@type": "Question", "name": "What is the ALL90054 made from?", "acceptedAnswer": {"@type": "Answer", "text": "The ALL90054 is machined from steel with a black oxide finish."}}, {"@type": "Question", "name": "Is the ALL90054 the same as the ALL90052?", "acceptedAnswer": {"@type": "Answer", "text": "No. Despite similar lengths (0.790in vs 0.795in), the ALL90054 is a steel roller-cam button while the ALL90052 is an aluminum flat-tappet-style button. They are built for different camshaft types and are not interchangeable."}}]}