Central vacuum cleaner white wall inlet, Allaway Optima. Fits 38mm hose wall end diameter with 16mm length and two locking lips. Suitable for handle starting & hose end metal ring starting vacuum hoses. Including also starting switch in the cover flap, vacuum cleaner can be started opening the cover flap. Dimensions: whole length 91mm, W 91mm, attachment holes cross length 54mm (40x40mm). Attachment screws & instructions included. Original Allaway spare part.