The part number on the retainer is TPR-04-17PS and they look to be in nice condition. Retainers are made from Ti-17 alloy which is far more superior than the Ti- 64 (6AL4V) material used by the competitors.
Retainers are seven degree exhaust. Retainers are sold in a set of seven.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.