SPMAS2000LBB Spektrum 1.9-Gram Linear Long Throw BB Servo. The AS2000LBB is a ball-bearing version of the AS2000L servo. It�s a high performance micro-weight servo used in ultra-micro heli and plane applications and is compatible with the AR6400 series Spektrum receiver. Ultra-micro aircraft builders will want the 2000LBB for the better control surface centering and robust action aggressive 3D flight demands. Compact footprint JST-SHR connector type Two ball bearings 9.1mm servo throw Size Category: Specialty Type: Analog Application: Ultra micro aircraft Torque: 2.8 oz (79.4 g) force Speed: 0.14 sec Length: 0.87 in (22.0mm) Width: 0.66 in (16.9mm) Height: 0.33 in (8.2mm) Weight: 0.07 oz (1.9g) Bushing Or Bearing: Bearing Bearing: Dual Gear Type: Nylon Voltage: 3.2V-4.2V