Old school double bolt Bmx seat clamp. MX engraved. I see no manufacture marks. Silver in color. This will fit all old Bmx bikes from 1978 to current. Size is 1”/25.4. Fits old redline mx2, mx3, mongoose’s, Supergoose’s, torkers, profiles, thrusters, gt’s. Cook Bros, Hutch and many many other Bmx bikes and cruisers.