STANLEY Garage Door Opener 24994 Limit Switch Actuator For Stanley Chain/Cable or Full Chain Drive garage door openers. Compatible with Stanley garage door opener models: GT200, GT300, GT400, MT130, TT100, TT200, TT300, V1000, V2000, ST100, ST200, ST300, ST400, ST500, NOT COMPATIBLE with door opener models: GT400, PT600, ST305, ST405, ST505, ST605, SW215, SW315, SW515, SW615, WH355, WH455, WH655, 5400 Series or Quiet Glide models.