Shires 87872 5" Flexible Rubber Mouth Full Cheek Bit - Happy Horse Tack Shop
Posterior Rubber Mouth Gag (Small)
Centaur® Stainless Steel Rubber Mouth Eggbutt Gag Bit
Forget plastic surgery - exercising the face with a pair of RUBBER LIPS will make you look 'youthful and vibrant', say Japanese designers | Daily Mail Online