Sightmark 30mm/1inch Medium/High/Extra High/Low Height Weaver/Picatinny Rings Made from durable 6061-T6 aluminum, the Sightmark 30mm/1inch Medium/High/Extra High/Low 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. Included in Package Weaver/Picatinny Mount Hex Key Reduction Inserts for 1 Inch Diameter Features Made from durable 6061-T6 aluminum Matte black, non-reflective finish Fits both weaver and picatinny rails Fits 30mm or 1inch riflescope tubes