Package Included: 40 Pack o-rings sealing ring inside fittings for 3/8 inch quick connect coupler.
Size: Outside diameter:17.1 mm / 0.67 inch; Inside diameter: 11.8 mm / 0.46 inch.
High Quality Material: Made of NBR rubber with tear and abrasion resistant; Compatible with many connectors and cleaners, suitable for cold and hot water pressure washer.
Function: Save water by reducing your leaks due to good quality O ring, and they are replaceable O-rings, fitting many pressure washer wands, hoses, and quick connectors.
Tips: Please pay much attention to O-rings of different size.