Neptune DOS Qd thread size for RO tubing adaptor

[FishOkay]

Could someone help me please. I've seen a few people using the little ro tubing adaptor on their neptune dos pumps and was wondering what size I would need?

 

[A_Blind_Reefer]

4 PACK - 1/4" x 1/8" nptf Female Adapter BLACK (Apex DOS Fitting) - Mur lok

Shop The Best Saltwater Aquarium Equipment & Supplies at Saltwater Aquarium. We Carry Everything you will Need for your Fish Tank.

www.saltwateraquarium.com