Features:
1 Silicone ring:
1) Various materials available
2) Various sizes available
3) Various colors available
4) Temperature: Up to 600oF / 316oC
5) Reusable and durable

2 Tapered plugs:
1) Various materials, including SIL, EPDM, NAT and NEO available
2) Various sizes available
3) Various colors, including green, red and black available
4) Temperature:
A) SIL: 600oF / 316oC
B) EDPM: 350oF / 177oC
C) NAT: 200oF / 93oC
5) Reusable and durable