Am Worldwide Test caps- red rubber set 20 units radiator repairs

Description

First radiator testing cap made from rubber compounded for the peculiar problems of the radiator repair trade. That good old, red, tougth, pliable rubber. Outholds and outlasts any other testing cap.
First testing cap beveled at the opening. They go on naturally and easily.
First cap rounded outside and inside at the closed end. The rounded outside surface is much  easier on the hands. The rounded inside surface gives the cap more strength.
Important! The size of each testing cap indicates that it is to be used on that size fitting. Example: Use No. 1-5 size on 1 ½” fitting. Due to the material used in some caps and the manner in which they are made  there has been a tendency to order a size smaller than the fitting on which the cap is to be used.
The set included 20 pcs.
Set consists of:
1"      1 ea.
1 1/8"  1 ea.
1 1/4"  2 ea.
1 3/8"  1 ea.
1 1/2"  4 ea.
1 5/8"  1 ea.
1 3/4"  2 ea.
1 7/8"  1 ea.
2"      1 ea.
2 1/8"  1 ea.
2 1/4"  1 ea.
2 1/2"  1 ea.
2 3/4"  1 ea.