Ring & rod assembly used in The Wizard of Oz's three sculped haunted forest pop bumper assemblies & in the two The Hobbit sculpted barrel pop bumper assemblies.
The Hobbit pop bumper without a barrel sculpt uses ring & rod assembly #11-005004-01, as does the State Fair pop bumper assembly in The Wizard of Oz.
See related product link below for the #11-005004-01 ring & rod assembly.
Jersey Jack Pinball #11-005004-00 & #11-5004-00.