BB-DB-B4                         BB-DB-B6

Full length:125mm(4.9in)                 180mm(7in)

Effective lenth:101mm(4in)                155mm(6.1in)

Weight:64g(2.6oz)[air]                  74g(2.6oz)[air]

BB-DB-B8                         BB-DB-B12

Full length:230mm(9in)                  325mm(12.8in)

Effective length:208mm(8.2in)               300mm(11.8in)

Weight:88g(3.1oz)[air]                  116g(4.1oz)[air]