Materical is : Stainless steel <br />Cage length of about 85 mm， inner diameter is about 36 mm <br />it has 5 kinds ring to choose : inner diameter of 38.1 mm， 41.3 mm， 44.4 mm， 47.6 mm and 50.8 mm <br />when you make order，please tell us which size you choose ring <br />Weight: about 143grams <br />size on the photo ，please check it <br />Price is for 1 piece <br />all goods keep secret packing <br />if you need wholesale price ， <br />please contact us <br />big order is big discount <br />any question pls contact us ， i will reply you fastest!