These are Prime Profile Scope Rings.
These scope rings fits on 17mm-22mm Picatinny weaver rail mounts.
Rings are for an outstanding mount.
Scope rings are for usual scopes 25.4mm and 30mm scope tube.
These are very top of the range scope rings for you rifle, and make a very good upgrade.
Subject material: Prime Quality Aluminum
Kind: Prime Profile( 21.3mm)
Ring Diameter: 25.4mm
Size: Because the picture
2 x Scope Mount Rings(30mm)
2 x 25.4mm Transfer Rings
1 x wrench
Subject material: Precision Machined from Aircraft-grade Aluminum Alloy with Anodized Black Matte Finish
Diameter: 25.4mm and 30mm / Card Slot: 17mm-22mm
Friendly Hex Screws with Retention Features.Simple to installation,
Are compatible into all 20mm Picatinny/Weaver Rails.
Package: 2 x Scope Mount Rings(30mm), 2x 25.4mm Transfer Ring, 1 x wrench