Mr. Gasket storage bags come in two sizes that are designed to protect your engine, transmission, cylinder heads, and crankshaft when not in use. The oversize engine storage bag is big enough to fit a fully dressed big block engine (including headers) & fit over most engine stands & dyno carts. The cylinder head / crankshaft bags are big enough to fit big block & Hemi style heads. These heavy duty thick clear poly bags have the Mr. Gasket logo printed on them. Engine storage bags are sold one per package, and the cylinder head/crankshaft storage bags are sold two per package.