SSB Single size blocking
were developed to block sewer lines during an air test, or for blocking flows. These are the most economical inflatable plugs available. These plugs are designed with a newly formulated natural rubber compound, making them the toughest and most dependable single size plugs available. Like the SST, the SSB plugs come with a removable 3/8" eyebolt and a removable 1/4" NPT tire inflation valve.