O Ring box O Ring kit 1.Different sizes NBR O ring kit 2.High Quality 3.Fast delivery 4.Customized product O ring box,O Ring kitItem No.:MBR-OR-KSize: 382pcs, 386pcs, 395pcs, 404pcs, 407pcs, 419pcsMaterial: NBR/NR/Silicone/EPDM/CR/FKMDifferent colors availableUnit: both metric and inchesMore infomation please visit www.cybsealing.com High Quality O Ring Box,O Ring Kit