KeyFeatures Adjustable Height:This is a 4-bolt pattern pump, which has an adjustable height range of 11cm/ 4.3". You can install it on the chair to adjust it to the right height for your needs, which is very practical. High Load-bearing Capacity:It can withstand 440 pounds of weight, so you don't have to worry that it will break easily because of the weight-bearing problem. Wide Application:It is suitable as a replacement part for most standard stylingchairs. Application This barberchair hydraulic pump is suitable as a replacement part for most standard stylingchairs in bars, restaurants, hairdressers and other places. How to Confirm Whether It Matches Your Seat Needs to Pay attention to the Following Four Aspects. 1.Upper interface requirements: Top thread of spindle: m8. 2.Shaft Diameter: 26mm. 3.Cone Ratio of shaft: 1:13. 4.Requirements for base connection: 4 holes and the diagonal spacing of holes is 115mm. And please bring four M6 nuts. Specification Model: YL700 Name: Barber Chair Hydraulic Pump Pump Body Material: Cast Iron Pump Casing Material: Plastic Surface Treatment: Painting Color: Silver Weighr Capacity: 200kg/440 pounds Thread: M8 Height: 38cm / 15.0in Height After Stretching: 49cm / 19.3in Adjustable Height: 11cm / 4.3in Connecting Shaft Diameter: 2.6cm/ 1.02in Hole Distance Between the Pump and the Base: 11.5cm/ 4.53in PackageIncluded 1*Barber Chair Hydraulic Pump Notes 1.The package does not contain the bottom disc and chair, so if you need it, please prepare it in advance.