Description: Name: Hot bed aluminum substrate,3mm thick aluminum substrate For 3D printer hot bed aluminum substrate, 24V Conviniently pre-wired with 1 meter long high temperature PTFE insulated wiring Use it with heated bed or extruder Temperature sensor 100K? accuracy of ± 1% High sensitivity, rapid response Small size, easy to install Wide temperature range, good stability, high reliability Specification: Material: aluminum substrate Size: 328x328x3mm/Effective print size: 300*300*3mm Package Includes: 1Piece Aluminum Heated Bed 1Piece Thermistor Note: Power adapter is notincluded. 300mm on the motherboard is just a mark, not the actual size, the actual size is 328mm MK2a and MK3 are mutually versatile