O-Ring Viton, ID 45mm, THK 2mm Replacement O rings for TYGA NSR250 expansion chamber. Remember to order four of these items to service both expansion chambers. This is a replacement part. When ordering chambers, this item is included in the price and you do not need to order this separately. Compatible with the following TYGA systems: EXCS-0003 EXCS-0005A EXCS-0005B EXCS-0006A EXCS-0006B EXCS-0047 Related
