(Click to see larger image) Tritech Research has sourced high-quality FDA-approved Silicone Rubber tubing for the PourBoy® 4 Sterile Media Dispenser. Extra tubing typically comes in 8 foot lengths: 5 feet for the inlet side of your pump, and 3 feet for the outlet side of your pump. Note: This is not the correct tubing for the PourBoy 3 — if you are looking for that, click here.