On 5/12/2014 Jim Pruitt wrote: > Each section cranks up and down using a > sawtooth strip and a gear. Can't help you on the ID, but FYI, the sawtooth type gear is called a "rack" and the gear that mates to it a Pinion, as in "rack and pinion steering" -- Charlie www.baysidephoto.com www.thegallos.com