ITEM NAME:Aluminum Heating Block For MK7 MK8 Thermocouple 3mm Mounting Holes Description: -Made of solid aluminum material, durable, long lifespan. -Perfectly work with nozzle and nozzle throat. -Inner hole for set screw: M6 and M3 (heat pipe and thermocouple). -Heater Mounting Hole: 6mm diameter. -Thermocouple Mounting Holes:3mm diameter. Specification: Material: Aluminum Size: 21x15x10mm/0.82x0.59x0.39inch Package Includes: 1 Piece Aluminum Heating Block SKU: DMO0011806863018286.Inner hole for set screw: M6 and M3 (heat pipe and thermocouple). 1 Piece Aluminum Heating Block. -Made of solid aluminum material, durable, long lifespan. Material: Aluminum. -Perfectly work with nozzle and nozzle throat.