Model	Main Ball		Sub Ball		Ball Cup	loading capacity(kg)		Remark
	Dia(mm)	Material	Dia(mm)	Material		ball up	ball down
BT381-0210	38.1	Carbon Steel	4	Carbon Steel	Carbon Steel,Hardened,Z/P	185	75
BT381-0210B	38.1	GCr15/52100	4.76	GCr15/52100	Carbon Steel,Hardened,Z/P	170	70