Foam gasket is made from EVA in black color, which can hold the coin tightly inside the holder and will not harm and any reaction with the coin.

Inner Diameter of gasket Rings: 17mm 22mm 27mm 32mm 37mm

Fit for coins Diameter in 17mm 22mm 27mm 32mm 37mm(hold the coin a littleloose)
Fit for coins Diameter in 18mm 23mm 28mm 33mm 38mm(hold the coin tightly)

Package included:

10pcs plastic Capsules cases with adjustable pads rings