G4 NiTi Closed Coil Springs Precision Manufactured by G&H Orthodontics.

G4 Nickel Titanium Springs
The unique G4 Nickel Titanium alloy developed by G&H is precision
formed into closed coil springs. G4 Springs provide consistent force and
remain active until the space is closed. Consistent force values and full
recovery are both achieved routinely with G4 NiTi Springs.

G4 Nickel Titanium Closed Coil Springs with Eyelets
Available with round eyelets on both ends (CC) or with one round and one
TAD spring engagement eyelet (TAD). Packaged in convenient dispenser
boxes, 10/box. See chart below for force values and part numbers.