请根据管子外径来选择修补器的规格！！！
不锈钢管道修补器规格， 耐压1.6MPA， 16公斤压力！
RCH-S-15A，适用管外径21mm， 修补器长度57mm
RCH-S-20A，适用管外径27mm，修补器长度57mm
RCH-S-25A，适用管外径34mm，修补器长度57mm
RCH-S-32A，适用管外径42mm，修补器长度57mm
RCH-S-40A，适用管外径48mm，修补器长度57mm
RCH-S-50A，适用管外径57mm，修补器长度80mm
RCH-S-65A, 适用管外径76mm，修补器长度80mm
RCH-S-80A，适用管外径89mm，修补器长度108mm
RCH-S-100A，适用管外径108，修补器长度108mm
RCH-S-125A，适用管外径133，修补器长度116mm
RCH-S-150A，适用管外径159，修补器长度116mm
RCH-S-200A，适用管外径219，修补器长度155mm
RCH-S-250A，适用管外径273mm，修补器长度155mm
RCH-S-300A，适用管外径325mm，修补器长度155mm
RCH-S-300A，适用管外径377mm，修补器长度155mm
RCH-S-400A，适用管外径426mm，修补器长度155mm