Body and Tip of Arrester SENTINEL Conventional Lightning Arresters are available in two finishes: stainless and solid copper with nickel tip. The tip of our arrester is specially made to withstand the effect of harsh environments and as such we are ensuring that our arrester will last longer than ordinary air terminals, for harsh environments, we recommend the stainless steel, for other less harsh environment, we recommend the solid copper with nickel tip. Base of the Arrester SENTINEL Conventional Lightning provide all-direction protection. The base of our arrester is made of brass and is uniquely designed to provide flexibility when installing. Installation angle can be adjusted by fix screw, fron 0 to 180? at 15? interval. Fixed base for arresters is also available.