Thick Plastazote Foam Tubing
It is non absorbent, non-sticky, washable and dishwasher safe. Supplied in 1 metre (39”) lengths, it may be cut to size. Lengths may vary plus or minus 50mm. First measurement is outside diameter and second measurement is inner diameter i.e. for the 31mm/6mm: 31mm is around the outside, 6mm is around the inside opening.