All acrylic sign holder displays and metal sign holder display clamps and stems shown have 3/8″ fittings.
A. Rectangular screw-on sign holder clamp – item is no longer available
B. Universal screw-on clamp.
C. Square spring clamp-fits 1″ square tubing.
D. Rectangular spring clamp-fits 1/2 rectangular tubing.
E. 3/8″ stems are threaded at both ends-12″, 6″, or 3″ long.
F. One squared end (Trimlock) and one threaded end-6″ or 3″ long.