- Test Titan™ features state-of-the-art design with only four components.- Leak-free seal at 7 times the PSI of ordinary plugs.- State-of-the-art design and low price combine to give the contractor the BEST VALUE of any mechanical test plug.- Only four pieces means fewer parts to wear out, fewer parts to lose.- 100% corrosion resistant. Top plate, wing nut and bottom plate/bolt are nylon 66. Gasket is flexible PVC.- Simply insert and tighten, the non-spin shoulder prevents the gasket from slipping.