Heat-break throat for the E3D V6 head is dedicated to M7 type BOWDEN heatsinks, made of steel...Trianglelab
Throat for the E3D Hemera head is a substitute for the throat for 1.75 mm Hemera. Part is made of stainless steel.
M4 on the cold side,
M6 on the hot side
The throat is compatible with V6, Volcano and Super Volcano heater blocks.