GAMBER Quick Adjust Upper Tube. 12 upper plate to extend equipment to desired position. Use with DS-LOWER-5 DS-LOWER-7 or base with welded pole. Narrative: Gamber-Johnson Quick Adjust Upper Tube Assembly. Inserts into DS Series lower tubes. No tools needed for adjustment. Entire upper section can rotate left and right with a simple twist of a lever. Set collar keeps the tube adjusted to the correct height while rotational adjustment are made. Description: 12 plate designed to be used with DS-LOWER-5 OR DS-LOWER-7