Prices vary depending on factors such as type, size, material, etc. Detailed quotes are typically required based on the customer's specific needs and order quantity.

For example:

DD215: Aeration disk with EPDM membrane in ABS with a diameter of 215 mm. Prices vary from 3.2$ /pcs to 5.4$ by the order quantity.

DD270: Prices vary from 3.9$  to 6.2$ by the order quantity.

DD330: Prices vary from 6.7$  to 12.1$ by the order quantity.

Also, the destination port also affects the price of the products.