Nathe Liverpool Short Cheek Driving 20mm Ported Driving Bit Bit Size:135mm They have minimal up take of They have minimal up take of water making them ideal all year round boots they're easy to give and taste great Nathe Liverpool Driving bit 20 mm with port short cheeks classical driving bitvariable rein options to adjust the leverage effect on the polleven distribution of pressure on the tongueshort shank: quick effect with less poll pressurecurb chain not includedOverview 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