Just a small project I've been wanting to do. This will allow me to take more aggressive cuts while preserving the life of my endmills.

The tubing is 3/8 inch

The coolant nozzle is the 1/4 inch size that sells on amazon for $10

The fittings are a 1/4 female to 3/8 male adapter and a 3/8 female to barbed adapter

The pump is a 30W 550 GPH aquarium pump