Upper Cover Gasket.
For L-series engines having 1- or 2-piece Valve Cover Assemblies.
Machines were sometimes changed from their original configuration over the years - check your engine to determine what style of valve cover assembly it has on it before you order.
Has peel-off adhesive on one side for attaching to Valve Spring Locator during engine assembly to make assembly easier.
Other numbers: #L-876; #21371900.