3mm ID x 5mm OD Soft Tubing
3mm ID x 5mm OD, or 5/3mm in metric. This is the smallest tube we carry, for micro applications rather than a main loop: small blocks, sensor lines and confined runs where nothing larger will turn.
Alphacool covers EPDM 5/3 in black at 1m and 3m, and AlphaTube HF 5/3mm in ultra clear at 1m. Our own ModMyMods 3mm ID x 5mm OD PVC is here in clear.
Flow through a 3mm bore is a fraction of what a 10mm run carries, so this is never a main loop size. Fittings have to be cut for 5/3 specifically.
