Automatic Mainspring Bridle 1.40 x 0.10 x 21.0 mm by Perrin Sale $10.00 | / SKU WP-BRID036 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available This Automatic Mainspring Bridle has the following dimensions (height x thickness x length (mm) 1.40 x 0.10 x 21.0 mm.