Zamakono:

	Mtundu	Oyenera Kudula Waya (mm2)	Miyeso Yaikulu (mm)					Nambala ya Bolt	Kulemera (kg)
			B	M	L	R	H
	JBB-1	6.6-7.8	44	12	90	4.5	50	2	0.62
	JBB-2	9.6 ~ 11.0	50	16	90	6.0	60	2	0.82
	JBB-3	13.0 ~ 14.0	56	16	124	7.0	65	3	1.90

Ndemanga:

1. Thupi lotchingira ndi mbale yakuvundikira ndi chitsulo chosasunthika, zonse zokhala ndi malata otentha.

2. Tanthauzo la zilembo zachitsanzo ndi manambala patebulo ndi: J-zolumikizidwa;B- Parallel Groove;B - mphezi;nambala imasonyeza chingwe chachitsulo chogwiritsidwa ntchito