TM-1 TM-3 Towa Bobbin Case Tension Gauge Guide Device Sewing Accessories For "L" and "M" Pre-Set Tension Made In Japan TM-1 TM-3 Towa Bobbin Case Tension Gauge Guide Device Sewing Accessories For "L" and "M" Pre-Set Tension Made In Japan. Sale price : $65.00 Category : Home & Garden