Kit double roller base is composed as follows:
2 pairs of pulleys 16 x 28 Sliding 16 mm;
2 axes 6 x 82 with 4 screws
1 stopper tube 170 with 5 screws
1 pair bank wavelengths with 4 screws
1 guide-line transformer
Ceramic configuration: Pulley with Ceramic bearings 6 x 15 x 5;