Nathe Standard 20mm Double Ring Bit Bit Size:140mm We also added a centre We also added a centre zipper that can be unzipped and folded down to provide space for a human passenger built for performance Nathe Standard bit 20 mm with additional small ringsflexible mouthpiece with low portbig rings not pivotable to the outside assists in riding turnssmall ring fixes big ring limited sliding of the mouthpiece direct effect on the tonguelies steady in the mouth suitable for horses with contact problemsbit guards protect the lipswith steel coreOverview of the advantages" made of high quality Thermoplast" for satisfaction and motivation on sensitive and mouth sensitive horses" excellent tolerance anti allergic" food safe solvent free no plasticisers" smooth surface no eraser effect" temperature neutral high flexibility when cold" dimensionally stable high mechanic resistance" steel core in Standard bits (except size 110 mm)" side parts made of high quality stainless steel" Made in Germany