<prompt> The components of activator are all except:Labial bowJack screwAcrylic portionDelta clasp  <response>: COMPONENTS OF THE ACTIVATORIt consists of the following elements:Labial bow: The wire used is spring hardened 0.9 mm stainless steel. The primary wire element of the activator consists of an upper andor lower labial bow. It consist of horizontal middle sections, two vertical loops and wire extensions through the canine-deciduous first molar embrasure into the acrylic body.Jack screw: Optional fitted to maxillary arch.Acrylic portion: This can be fabricated in cold cure acrylic directly on the models or a wax matrix can be made first and then invested in the flask.Key Concept: Delta Clasp is used in Twin Block appliance.Reference: Textbook of orthodontics 2nd ed Gurkeerat Singh page no 519 