One-way valve half inch - Model A

Size: 1/2 inch note general: 1- You can save and benefit from the shipping cost by purchasing other needs with this order at the same shipping cost... but in one order 2- the buyer has the right to return the purchased item within 3 days from the date of receipt and bears the full return costs 3- when receiving the returned item intact as sent, only the value of the item will be refunded without the shipping costs