Set of replacement clear silicone O-rings in a range of sizes.
 
1mm - 5mm kit contains nine rings, one of each size: 1mm, 1.6mm, 2mm, 2.4mm, 3mm, 3.5mm, 4mm, 4.5mm & 5mm. 
5.5mm - 10mm kit contains ten rings, one of each size: 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm & 10mm.