2-inch 10-14 gauge square tubing plastic end cap plug Fits square tube inner hole or opening - (from 1.732 inch up to 1.834 inch) or (from 43.993 mm up to 46.584 mm). 14-20 gauge square tubing end cap plug fits square tube inner hole from 1.834 Inches to 1.930 Inch (from 46.584 mm up to 49.022 mm) IMPORTANT: Will not fit a (2" inch or 50.8 mm) inner square hole or opening. Fits square tube outer dimensions 2"inch or (50.8 mm) Fits from 10-14 or 14-20 gauge wall thickness (select appropriate variation.) Has proof of size (10/14 GA or 14/20 GA) embedded on the side of Cap. Designed with flexible ridges for easy install and multi fit range. Plastic plug 2 inch has many general uses: chair glide floor protector, fence post end cap or plug, fitness equipment, tubing and pipe end caps for finished clean look Works with 10-14 gauge tubing or pipe Material heavy duty black LD polyethylene UV weather resistant Hardness durometer 50d