High Temp Masking Supply(1) 2 1/8" x 2 1/2" #12 Silicone Rubber Tapered Stopper Plug Powder Coating Paint

I bought a variety of sizes and they work excellent for automotive evap testing to plug components and the larger size works great to seal off the gas cap fillpipe neck.Also bought the caps in a variety of sizes as well.Wish I had these sooner,the harder plastic ones they make specifically for this purpose never ever seal correctly because they don't conform very well especially when something as small as a .010 of an inch leak will trigger a code,nothing gets by these softer silicone caps and plugs.

Holds up well to heat from welding, just don't overdo it.

As described. However, I did not measure accurately, these do NOT fit standard 20oz or 30oz tumblers- they are too small.

these are awesome for all my painting projects

great product