Check the listing for details. 2 Pcs 300cc Flow Restrictor Push In Quick Connect Unter Sink RO Water Filter. Color: As Picture, Condition: New. Listed at 9.48 USD. Our Store Feature of Flow Restrictor:A flow restrictor is design to create back pressure on the membrane and allow the membrane to produce purified water to be delivered to the storage tank. Flow restrictors are sized to match the flow with the size of the membrane. Package Included: 2 Piece 1/4" -1/4" 300ML Flow Restrictors ------------------ Payment: Accept Paypal only Shipping: 1.Ship to Paypal registered address, buyer please email us to notify any change address. Seller are not responsible for any wrong or undeliverable address. 2.No local pickups. Return: 1.Unless specified, products are normally guaranteed for 30 days upon the date of purchase. 2.Item returned must be labelled with a Return Merchandise Authorization( RMA) Number, whick is notified upon request through Ebay message.It return without RMA# will not be accpeted. 3.Replacement or full refund will be made for defective products returned after seller's verification. Others: If you have any questions, please contact us by Ebay message. We have always been doing our best to provide you the best service and reliable products.Please contact us to resolve the issue before leaving any negative feedback or low detail seller rating. Thank You !