Model	Main Ball		Sub Ball		Ball Cup	loading capacity(kg)		Remark
	Dia(mm)	Material	Dia(mm)	Material		ball up	ball down
BT317-0110	31.7	Carbon Steel	3.18	Carbon Steel	Carbon Steel,Hardened,Z/P	145	60
BT317-0110S	31.7	Stainless	3.18	Stainless	Stainless	50	20