Anyone can hold a gag during a bondage play. However, being able to deep throat a gag is a whole different thing that can be highly prized if you know what I mean ;-) 
 
BONBDSM has invented the world's first Silicone Deepthroat training gag! Our extra large Deepthroat training gag comes in three sizes, non-toxic, totally safe, and is 100% pure silicone. Our silicone has a completely neutral taste and smell. The unique design is a delight. It's simple to switch between the gag sizes using our thick and soft, high-quality leather belt.
 
The gag fits easily, using a locking buckle closure. 
 
Features:
1) Penis Gag sizes: 
Small - Diameter 1.58 inch (40 mm), Length 2.16 inch (55 mm).
Medium - Diameter 1.58 inch (40 mm), Length 3 inch (77 mm).
Large - Diameter 1.58 inch (40 mm), Length 3.6 inch (92 mm).
2) Quality Leather and Non-toxic Silicone. 
3) Uses quality locking buckle for secure closure.
4) Designed to train your partner Deepthroat and ensure that your partner keeps their mouth shut.
5)  Sold as a set or separately.
6) Fits all sizes.