The 819M-PFR-1.0-2.5 Port Frame Reducer mounts onto the 2.5 inches port frame to change the port frame to 1 inch diameter. This allows accessories designed for smaller port sizes to be used with larger port frames. Coated with white reflective barium sulfate. It replaces 819M-PFR-SF-2.5. Tighten with two M3 size set screws using a 1.5 mm allen wrench, which are included with the part. 

819m pfr -1.0-2.5端口框架减速器安装在2.5英寸端口框架上,将端口框架改为1英寸直径。这允许为较小端口尺寸设计的附件与较大的端口框架一起使用。涂有白色反光硫酸钡。它取代819 -再生-旧金山- 2.5。用两个M3大小的固定螺丝紧固,使用一个1.5毫米的内六角扳手紧固。