Specification Product Name: RC 12MM Wheel Hex Product Material: Aluminum Alloy Product Color: Blue Features This aluminum 12mm wheel hex adapter is an excellent upgrade for Tamyia Grasshopper/Hornet/Frog/Wild One It is much stiffer than the standard stock parts, and offer more power transfer to the RC Cars The center holes of the four wheel must be enlarged to 5mm Brand new and made of high quality material Easy to install and durable Novel appearance and exquisite workmanship Packaged List 4pcs * RC 12MM Wheel Hex SRB Chassis #58496 Fast Attack Vehicle #58525 Wild One #58539 Fast Attack Vehicle -Shark #58384 Subaru Brat #58354 The Frog #58336 The Hornet #58124 Super Hornet #58346 Grasshopper #47438 Super Storm Dragon #58643 Grasshopper 2 Note We will use PE or bubble bag to pack it well and protect it well. Don't worry. If the item damaged, please contact us firstly immediately before leave feedback, thanks for your understanding. Due to hand measure, there will be errors, subject to the actual product Due to Different Monitor, the color may have difference