Part # SPK-B2B4-(length)
     Standard Lengths Available:

           1 meter (3 foot)
           2 meter (6 foot)
           3 meter (10 foot)
           5 meter (15 foot)
           8 meter (25 foot)
           11 meter (35 foot)
           15 meter (50 foot)
           23 meter (75 foot)
           31 meter (100 foot)
           38 meter (125 foot)
           45 meter (150 foot)