Bracket for attaching a Diamond Hotend (needs Venturi of your choice) - most are the same and already have 40mm holes to attach.This design allows for a standard 50mm fan (older style CPU fan, etc.) - to fin directly over the top, and is thick enough that when printed as Solid infill - practically unbreakable. Print in ABS for strength and due to closeness to Hotend, or in PLA should also be OK(images of Purple unit are Not final design, and printed in ABS - later design is slightly thicker and projects slight further forward to give space for the Fan.) - includes abutment to increase verticle strength.3rd Image attached shows the same bracket with an adaptor fitting on another Cartesian printer using same Holes as used against the A8.