I have 2 battery powered Black+Decker string trimmers, one with the EZ Feed button and one without that function. This cap fits both perfectly, with the EZ Feed working on the one. I printed this on an Ender 5 Plus with a .8mm nozzle, it came out really great. You will only need 2 small support structures for the locking tabs. Printed out of PLA but will print in PETG if it's needed. In the cover photo, the orange is the original and the black is the printed cap.