Replacement O-rings fit many pressure washer wands,hoses,and quick connectors.Made of NBR Rubber.It is compatible with many chemicals and cleaners.Tear and abrasion resistant.Suitable for cold and hot water pressure washer.Designed for 1/4 Inch,M22,3/8 Inch quick connect fitting.Made of NBR Rubber.It is compatible with many chemicals and cleaners.Tear and abrasion resistant.Suitable for cold and hot water pressure washer.Colour:Black Material:rubberDimensions:inner diameter 9.2mm and 11.8mmPackage Contents:20 x 1/4 Inch O-rings20 x 3/8 Inch O-ringsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.