BoreTech Extreme CLP Size:4oz This model has BaK4 prism Type:220 Swift This model has BaK4 prism glass with anti reflective FMC coating for increased light transmission Pilots are machined Aluminum and are made so that each cartridge type has the neck shoulder area of the case placed in the correct location within the annealing machine Extreme CLP’s technologically advanced formulation incorporates proprietary additives that penetrate deep into the metal’s pores and bond to the surface creating an enhanced film strength layer that provides superior anti wear properties over a wide range of operating temperatures The micro thin film has surpassed 100 hours in the ASTM B 117 salt spray test and proven to effectively displace moisture and neutralize corrosive residues