This base foam is specially designed for Systainer® T-LOC 1-5 (I, II, III, IV & V). Made of soft 25mm-thick closed cell foam, this unit fits snugly into the base of a Systainer®. This unit features a grid of perforated cubes, 15mm x 15mm, so you can customize the inside shape of just about anything you wish to store or transport. Use by itself or, if additional depth is needed, use in conjunction with Pick & Pluck Filler foam to build up the bottom of the Systainer®.