Sightmark 30mm/1inch High Height Weaver/Picatinny Rings Made from durable 6061-T6 aluminum, the Sightmark 30mm/1inch High Height Weaver/Picatinny Rings are the perfect accessory to secure a shooter’s most trusted riflescope. With a matte black, non-reflective finish these lightweight rings are constructed to fit both Weaver and Picatinny rails. The Sightmark rings come packaged with a hex key and reduction inserts for optimal adjustments.