288 New Watch Band Spring Bars & Organizer. This is a new assortment of 288 spring bars in a partitioned box. This assortment includes double shoulder, thin curved, extra thin, and telescopic. You receive: Twelve 5/16" (8 mm) double shoulder spring bars. Twelve 3/8" (10 mm) double shoulder spring bars. Twelve 7/16" (11 mm) double shoulder spring bars. Twelve 1/2" (13 mm) double shoulder spring bars. Twelve 9/16" (14 mm) double shoulder spring bars. Twelve 5/8" (16 mm) double shoulder spring bars. Twelve 11/16" (17 mm) double shoulder spring bars. Twelve 3/4" (19 mm) double shoulder spring bars. Twelve 13/16" ( 20) double shoulder spring bars. Twelve 5/8" (16 mm) D.S thin curved spring bars. Twelve 11/16" (17 mm) D.S thin curved spring bars. Twelve 3/4" (19 mm) D.S thin curved spring bars. Twelve 1/4" (6 mm) extra thin D.S spring bars. Twelve 5/16" (8 mm) extra thin D.S spring bars. Twelve 7/16" (11 mm) extra thin D.S spring bars. Twelve 1/2" (13 mm) extra thin D.S spring bars. Twelve 9/16" (14 mm) extra thin D.S spring bars. Twelve 5/8" (16 mm) extra thin D.S spring bars. Twelve 11/16" (17 mm) extra thin D.S spring bars. Twelve 3/4" (19 mm) extra thin D.S spring bars. Twelve 9/16" - 5/8" (14 - 16 mm) telescopic spring bars. Twelve 5/8" - 11/16" (16 - 17 mm) telescopic spring bars. Twelve 11/16" - 3/4" (17 - 19 mm) telescopic spring bars. Twelve 3/4" - 13/16" (19 - 21 mm) telescopic spring bars.