This is a set of 2 brand new lid gaskets for the popular Dura-BULL rotary rock tumbler/polisher. This is a non factory original gasket for the "See-Through" barrel.  This sale is for the gaskets only, no tumbler or barrel included. 

This is an "O" Ring Style Made From Buna Nitrile, It Has Greater Flexibility and Abrasion Resistance Than The O.E.M. 

*15 Year Shelf Life!*

They Stay Pliable Down To -20 F And Withstand Temperatures Above 250F.