PRODUCT NAME:QR-ST-A-1046 SPECIFICTION ORIGINAL NO:281860 PORTS:SUP=3/4"PT,RES=3/8"PT,ALL OTHER 1/4"PT SPECIFICTION ORIGINAL NO:281865 PORTS:SUP=3/4"PT,RES=3/8"PT,DEL=2*1/4"PT+2*3/8"PT,EM+SER=1/4"PT We supply long-term series of high-quality truck auto parts,.hand brake valve,spring brake chamber,clutch servo,water pump,auto cylinder air dryer. Welcome to browse our website,if you are manufacturer or trade company need relay emergency valve,do not hesitate give us good advice and consultation ,we are glad to service you.and we hope you can provides detail of product introduction .Welcome to discuss and negotiation