Features:
Advantages:Nested, no slip taut, solid, thick
Uses:Embroidery tools, decoration, photo frames, quilting and other crafts production
Description:Because the outer rubber ring is elastic, so there may be a small depression on the ring extruded during transport, the horizontal plane may not be flat or round, you can adjust the flat and round with your hand, this is related to the principle of taut fabric and material, taut fabric also slightly flatten the inner ring to be able to set on.