【Compatibility】1'' is designed for front fork of 25.4mm, also compatible with 19mm-22mm fork hole. Please kindly select the correct length of Compression Plug based on the thickness of your bike stem. 【Stability】The compression plug adopts a very stable structure, except its good manufacture, the most adorable thing is its high strength plug bolt, which makes it can take more torque and keeps it tighter inside. All these make it distinguished. 【Outstanding Quality】Compared to other compression plug, Thinvik's more reliable. From the bottom to the top, the base's thread is more precise and has a longer and deeper hole for securing more stability. The body part is made more sophisticatedly, use hard anodizing and tied with 2 stainless steel springs. The upper cone part is also more precise as the base and smoother. 【High Quality Material】Some other plug bolt is made of soft mild steel, which is easy to be broken. But Thinvik's made of high quality alloy and is hard to break. Please order without worry. 【Warranty】We provide our customers with profesional service before and after purchasing, if you have any question about our product, please feel free to contact us.