This extruder heatsink support tubes will eliminate the unnecessary bending tension on the empty side of the heatsink of the Anet A6's extruder, caused by the screwing solution.
*Don't forget to multiply the object or to print it twice as you will need 2 tubes of these (one per screw).
Ps. You may have realized that to install these tubes you will need to disassemble some extruder parts by unscrewing the two screws (as shown in the photos), which can be fun if you are new to this 3D printer and want to know what's the extrusion area like.
Update: I made this thing a while ago and I think it's still valid, but to anyone using this type of extruder I would suggest checking this piece https://www.thingiverse.com/thing:2840380.