Customized Scope Accessories Billings 30mm 3/8 Scope Rings are designed to fit all standard 3/8" rimfire rifle and 11mm airgun dovetail rails. 1. Introductions Billings 30mm 3/8" Scope Rings are designed for 30mm scope tube to fit all standard 3/8" rimfire rifle and 11mm airgun dovetail rails. They are made of CNC machined aircraft grade aluminium alloy to withstand unreal amounts of recoil without losing your zero and for many years' service. Internal cushion tap can well prevent damage. You can choose the low, middle or high profile according to the objective lens diameters. 2. Specifications & features 1) 30mm inner diameter 2) Low, middle or high height for different objective lens. 3) Aircraft aluminium with anodizing finish 4) Internal cushion tap is available 3. FAQ 1) --What's your MOQ? --Our MOQ is 100PCS 2) -- website:http://www.billingsoptical.com/scope-accessories/