... ,6+3,8+3,5+4,6+4,8+4,10+4,6+5,8+5,10+5,15+5,20+5, ... 6+6,8+6,10+6,20+6,8+8,10+8,10+10 ... ,15+10 ... Very Good ExcellentStd sizes(OD) Unlimited 3''to26'' 10''to40'' 4''to24''Handling &Installation Excellent Very good Very good ... high manganese steel (3) 5-10 times harder than tool steel (4) 1.5-2.5 times harder than ...