Tier One 40mm - Optic Level Black. Even slight cant changes at long range will change your point of impact. Ensure your accuracy stays constant with their NEW lightweight 16gm Tier-One Optic Levellers. Their Optic Levellers mount quick and simple. And at only 10mm wide will fit unobtrusively onto your rifles scope tube. The low profile and slim design enables them to be mounted with the bubble top bottom left or right and be viewed from four positions on the optics body for ease of view providing a constant visual confirmation of correct cant whilst shooting. Manufactured in the UK from Hard Coat Anodised 7075T6 Aluminium for durability. Recoil proof bubble ensures no separation with heavy recoiling calibers. Can be placed in four positions on the optics body tube. Specifications for Tier One Optic Levellers: Manufacturer: Tier One Color: Black Fabric/Material: Aluminum Package Contents: Tier One Optic Levellers Nil Tier One T1OPTILEV40: 40mm - Optic Level Black