Total 36pcs include: 10pcs 0.2-1.0mm stainless steel needles,25pcs copper nozzle, 1 pcs wrench. All of the needles come in a neat plastic tube with a screw lid to keep them safely together. The Needles are , won't break, twist easily, this drill bits will clean your printer nozzles and other small parts: throat, feeder gear perfectly. Fitment:For MK10 M7 thread aluminum heater block. The 3D printer nozzles are made of high quality brass material, sturdy and durable, easy to install. Specification: Nozzle size:0.25mm/0.00070.02in 0.45mm/0.0010.02in 0.65mm/0.0020.02in 0.85mm/0.00300.02in 1.05mm/0.00320.02in Material: Brass Drill bit size:0.22mm/0.00070.007in 0.252mm/0.00080.007in 0.32mm/0.00100.007in 0.42mm/0.00130.007in 0.52mm/0.0020.007in Material: 304 Stainless steel Wrench Material: Stainless steel Package Includes: 1 Set of 3D Printer Nozzle Cleaning Kit (10 Pieces 0.2-1.0mm needles 25 Pieces 0.2-1.0mm nuzzles 1 Pieces Wrench) Note: Please allow 0.5-1cm difference due to manual measurement. The real objects may have some color differences with the photos.Thanks for your understanding! Sharp parts, please keep away from children.