Which concrete plugs for element

[fender stratocaster]

I am going to hang up an older Element, about 1.5 meters long and approximately 70cm high. I plan to attach the brackets to the concrete wall in the basement with four plugs. How thick/long should the plugs and screws be to ensure it holds?

 

[-RB-]

When I have mounted radiators, I have used expansion bolts instead.
Example here: https://www.clasohlson.com/se/Expan...3ffoI6ON9JAqj_xi_oAsapduHb0b0R3BoCCeEQAvD_BwE

 

[Nicro]

8-10mm nylon plug, 6-8 mm screw that extends about 5mm through the plug after adding the thickness of the bracket is sufficient.