Cylinder Seal Kit model numbers 6504960 6661288 7137771 G00455 for performance in heavy-duty applications Designed to fit a wide range of skid steer loaders including models 310 313 371 440 434 444 443 500 and 500E -engineered replacement seals proper hydraulic cylinder and reduce fluid leakage Constructed with materials to withstand worksite conditions and frequent use Easy to install and compatible with specifications for consistent functionality, Manufacturer: CTbyeuOkw