Knott Coupling Gator Cover KF7.5 MP2035B Bellows Bolt Cover,50/60/3 Folds - Maypole Trailer Coupling Protection Sleeve (natural length, not stretched or shrunk) Damaged, split or missing gators allow grit and debris into the draw bar slide tube causing excessive wear to the coupling. This listing is for a replacement gator / bellows for braked Knott Hitches / Couplings. Will fit Braked Knott Couplings Models KF7.5 & KRV13-30. (Braked hitches normally have a plate showing the model number). 60mm diameter where it fits over the coupling body (trailer end). 50mm diameter where it fits over the hitch (car end). Approx 130mm total length. (natural length, not stretched or... It is recomended that damaged gators are changed as soon as possible. Genuine Knott Avonride KF Coupling Bellows/Gaiter- For Pressed Heads Ideal to replacement damaged, split or missing gators. Fits Braked Knott Couplings KF7., 5 & KRV13-30 Trailer Hitch Coupling Gator Bellows Genuine Knott KFG13 KFG20 KFG27 KFG30 This listing is for a replacement gator / bellows for braked Knott Hitches / Couplings. Approx 130mm total length. 60mm diameter where it fits over the coupling body (trailer end).