Caution: 1.which machine model does this protective cover apply to? It Working perfect in 19x19x13mm size MK10 heater block(M7 threaded).Before you buy, make sure your heating block size is correct. if your block is the right size, and the cover work for it. 2,Provide product design drawings and put them in Amazon page.Our Heater Block Cover size is 22 x 22 x 16.5 mm / 0.8 x 0.8 x 0.6 inch, inner hole diameter is 10 mm (see picture 2) Item Type: Heated Block Model Number: sock for MK10 block Brand Name: Funssor Color Available: Blue Material: high-temperature silicone Apply: MK10 type heater block socket