Engine piston Key buckle-发动机活塞钥匙扣

Compact and exquisite, with a diameter of only 18mm, it can move the keyring, simulate the shape of a piston ring, and swing to make a crisp sound.. The consumables PLA or PETG can be inserted into the hot melt and fixed at both ends. The printing configuration parameters have been added. Please keep the printing board clean to avoid a decrease in stickiness. We have tested several versions to ensure that the size is suitable. If you also like it, please feel free to provide support. Thank you···· 小巧精致，直径只有18MM，可以活动钥匙环，模拟活塞环造型，摆动可以发出哒哒哒的声音，声音清脆。。 耗材PLA或PETG塞入热熔二端固定即可。 已经添加好打印配置参数。请保持打印板干净，避免粘性降低。 测试了数个版本保证尺寸合适，如果您也喜欢欢迎给与下载支持，谢谢····