40N/9 lb Gas Support Cabinet Door Hinge Safety Lift Support, Soft Close Support and Cushioning Retractable Cabinet Door Rubber Head Gas Spring Support 6" Length Black - (4 Pack) - Amazon.com
Source SG-HC60120 200 kg heavy duty retractable stainless steel German zipper door hinge on m.alibaba.com
Stainless Steel Pivot Door Hinge Heavy Duty Pivot Hinge for Wood Doors 360 Degree Shaft Stainless Steel Murphy Door Pivot Hinge System - Walmart.com