Features:Brand new and high qualityGreatly improve the accuracy, save-time and convenient for operation.Great workmanship, with strict quality control and quality assurance.High safety factors, can be used with peace of mind.It is light in weight, small in size, convenient for you to store and manage, will not take-up too much space.A perfect and practical replacement part for hand operated Air pump, PCP pump, etc. Specifications:Material:PlasticMain Color: Black Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 Set PCP Pump Sealing O-rings