This is a replacement heatsink for Revo Six. It works with a Revo HeaterCore and Revo Nozzles. - Compatible with 1.75mm filaments - Anodised black aluminium heatsink keeps things cool and looks cool too - Identical height, diameter, and groove mounting to E3D V6 for drop-in upgradability - Works with Revo HeaterCore and Revo Nozzles – change nozzles without tools and hot tightening! Please note: This heatsink is not compatible E3D V6 ecosystem parts.