【Product Information】: 4 pieces of shower door bottom sill guides.1 dual-purpose screwdriver. Dimensions: Length: 3.12inches, Width: 0.58inches, Height: 0.5 inch 【Noise Reduction】: Precision groove guide design eliminates wobble and noise. Shower Sliding Door Bottom Seal Guide reduces friction and sway, ensuring quiet, smooth operation every time you open or close the door 【Solving Problem】:This shower door threshold rail solves common issues like derailment, wobbling, and sliding jams. It helps keep sliding door panels centered in their respective tracks, featuring anti-wobble and anti-derailment design. As a shower door hardware accessory, it effectively prevents the door from swinging outward 【Installation】: First, lift one corner of the glass door panel. Then, use a flat-head screwdriver to align it with the track and snap it into place