Features： 1、Wide Applications: O ring can be used for pipelines, machinery, faucets, garages, workshops, automobiles, doors and window, electrical appliances, bearings, pumps, etc. 2、Applicable Excavator: O ring sealing assortment kit is specially designed, perfect replacement for SH construction vehicle excavator to accurately meet your demands. 3、Premium Material: Air Conditioning Seal Washer kit is made of advanced HNBR material, resistant to low temperature and high temperature with range between ‑45℃ to 165℃. 4、447 Pieces Quantity: The kit contains a total of 447 pieces of O rings with different size, packed in a plastic box with many compartments, convenient for using and easy to carry. 5、Practical Tool: Universal O ring rubber kit is an essential tool for all workshop and field service engineers, professional manufacturing, high performance. Specification： Item Type: O Ring Seal Kit Material: HNBR Rubber Fitment: Replacement for SH construction vehicle excavator Package List： 1 x O Ring Seal Kit (447pcs) 1 x Storage Box