Usage: 1. The cement wiper plug contains Standard Cement Wiper Plug and Non-Rotating Cement Wiper Plug. 2. The plugs maintain separation of cementing fluids, wipe casing walls clean,and prevent cement contamination. 3. When bumped against a float collar, they provide positive indication of displacement and casing seal ability. Features: 1.STD. plugs are designed for compatibility with all types of float equipment;Non-Rotating plugs are for non-rotating float equipment. 2.Secondary sealing and wiping fin on top and bottom plugs. 3.Polyuerethane fins for superior casing wipring and abrasion resistance. 4.Special anti-rotation mechanism to drill out faster. 5.Neither PDC nor rock bit drillable.