Black alloy scope rings with 4 ring screws giving 4 points of secure contact. Clean lines with fully recessed screw heads. Similar in design to the very expensive Leopold scope rings. Suitable for any centrefire guns and .22 guns and airguns. 1) 1" low profile, 19mm base to centre (and 7mm base to saddle), weaver. 2) 1" medium profile, 25mm base to centre (and 13mm base to saddle) weaver. 3) 1" high profile, 32mm base to centre (and 20mm base to saddle), with see through, weaver (spacer fitted). 4) 30mm medium profile, 26mm base to centre (and 13mm base to saddle), weaver. 5) 30mm high profile, 32mm base to centre (and 18mm base to saddle), with see through, weaver. - 6) 30mm low profile, 25mm base to centre (and 10mm base to saddle) "DOVETAIL". sorry SOLD OUT, more due in about 4 weeks. (if you want #4 or #6 ring set to fit a 1" scope tube, I have sleeve adapters available for $5 a set) + I have 222 Loctite listed and its recommended to use on the screws.