With side lock screw hole small size easy to DIY very suitable for your 3D printer. With stable and excellent performance can be used to replace old or damaged heat sink. Compatible with various printer for CR? 10 series (10/10mini/10S/10S4/10S5 ) and for Ender? 3 3D printers. Small in size and light in weight convenient to carry and use at any time very convenient and practical. Made of high? quality aluminum alloy sturdy and durable have a long service time.