This product has three different sizes so you can cut off the right size. Then you can choose which size best fits your frame and cut it off. Then you place it in the sawn-off frame with one half in the frame part and so that the other half disappears in the hoop you want to weld on it. Leave about 2.5 millimeters between them. This is where you are going to put the weld. Then the insert is properly welded, it gives maximum reinforcement and both frame parts are firmly attached.
Large to small
Frame motor, outer diameter: 28mm. Size insert outside diameter 23,7mm.
Frame motor, outer diameter: 24,5mm. Size insert outside diameter 20,7mm.
Frame motor, outer diameter: 22mm. Size insert outside diameter 17,7mm.