1.Millingontheporcelainteethsupplybetterretentionforthecastingpartialdenture.2.goodbiocompatibility3.superiorrestorationeffect.4.reasonablepriceifyouneedoryouh***eanyproblems,plzcontactme.SkyYangAddress:2/F,Block66,FuminIndustrialZone,PinghuMobile:008613632686067E-mail:dental_lab@Website:http://Skype:tooth_skyMsn:tooth_sky@)