Steel 40mm butterfly hinge - Eclipse

Hinges, Door Hinge, Gate Hinge

Ball Bearing Hinges Grade 13 - JS Pearson Architectural Ironmongers

Universal Spring Hinge Door Closer Butterfly Spring 68405 Fits on Most Door Butt Hinge Pins, Self-Closing Spring 8 Pack

Eclipse Fire Door Hinges, Hinges

Double action adjustable spring hinge (sold as pairs)- satin stainless steel. These have not been tested as thoroughly as other makes- so the weights

Eclipse Stainless steel Double Action sprung hinge- Silver (140XX)

MARINE GRADE T Hinges Accessory Stainless Steel Boat Door Flush Triangle for M5 £12.37 - PicClick UK

Eclipse Fire Door Hinges, Hinges

Door & Window Hardware / Ironmongery / Frisco

Matlock 102x76x3mm SGL ACTION SPRING HINGES (PAIR)SSS 9499360K

From The Anvil Black 2 Half Butterfly Hinge (pair)