Prussic Pulleys	Ref	Certification	Max. rope diameter	Sheave	Efficiency	Working load	Weight (g)
Mini	P59	CE EN 12278	£ 11mm	25mm Sealed ball bearings	0.91	2 kN x 2 = 4kN	80
Gemini	P66	CE EN 12278 NFPA L	£ 11mm	25mm Sealed ball bearings	0.91	2 x 1.5 kN x 2 = 6 kN	130
Minder	P60	CE EN 12278 NFPA G	£ 13mm	51mm Sealed ball bearings	0.97	4 kN x 2 = 8 kN	310
Twin	P65	CE EN 12278 NFPA G	£ 13mm	51mm Sealed ball bearings	0.97	2 x 3 kN x 2 = 12 kN	580