This is a no-compromise motion kit - the absolute best you can buy, bar-none there is no other motion kit available for a Voron that beats the Berserker.
This motion kit includes:
Gates EPDM Belts (6M 6mm)
Genuine Gates GT2 20T (6mm wide) Pulley (5mm bore) --- 3pcs
Genuine Gates GT2 20T (6mm wide) Toothed Idler (5mm bore)---2pcs
IGUS GE5C Bearing EGLM-05 --- 3pcs
Berserker ABEC9 F695 2RS Bearing --- 20pcs
5x30mm Shaft ---------------- 1pcs