Genie Screw & Trac Drive Garage Door Opener Replacement Limit Switch 20113R Genie Garage Door Opener Limit Switch model 20113R Compatible with Genie Screw and Trac Drive garage door openers with Standard Rail assemblies Not compatible with Genie Garage Door Opener Excelerator Models Replaces Genie Genius Trac Drive limit switch models 19795S and 22785R Replaces either the UP or the DOWN limit switch