Oatey 4 In. Single Size Test Ball Stringliner Features a black finish with

Features a black finish with polished blades

heavy duty

and get exactly the materials they need

High-quality carbon steel forged head

which allows for focusing radiant heat in multiple directions

Oatey 4 In. Single Size Test Ball Stringliner Features a black finish withSingle Size Test Ball is a must for those involved in the installation and repair of residential, commercial and industrial pipping systems. Can be used for head pressure testing or as a blocking plug for low pressue air testing. Easily fits test tees, sanitary tees, floor drains and roof vents. Much more flexible than traditional mechanical plugs. Made from long lasting, natural rubber. Molded with Cherne's trademarked rib design. Includes a 12 In.