English Riding > English Tack > Bits Centaur® Stainless Steel Featherweight Hollow Mouth Eggbutt 5" sku: 63597 Price $29.99 QTY Add To Cart + Add To Wishlist Description Size Chart Reviews With 70 mm round rings. Each side of the bit is perfectly balanced to assure total comfort and response. Lost wax cast and hand polished from the highest grade of 18/8 Stainless Steel. Lifetime guarantee against rust. 5" No size chart for this product.