Catgut 1 mm is most commonly used for older clocks with wooden pulleys. Catgut 1 mm is 1 mm in diameter and has 2 coils that measure a length of 3.5 M each (a total of 20 ft).
Catgut 1 mm is most commonly used for older clocks with wooden pulleys. Catgut 1 mm is 1 mm in diameter and has 2 coils that measure a length of 3.5 M each (a total of 20 ft).