Made of flexible rubbery plastic that expands to receive the bobbin and then tightens up around it to hold it in place. Prevents threads from tangling or unwinding and holds over 20 bobbins securely. Holds standard plastic or metal bobbins that are 13/16" in diameter.
Entire unit measures 5 1/8-inch in diameter.
Origin: Distributed from Canadian Supplier, Manufactured in Japan
