Steel O-ring, metal O-ring.O-ring size refers to the inner dimension of the ring.The 30mm O-ring fits a 30mm wide band, thong, strap, stick, pole, etc. Suitable depending on the load: walking stick, bag, backpack, belt, belt bag, cell phone bag, decoration, pet accessories, safety products, etc.Also suitable for bridles and halters for hobby horses. steel / metal O-ringthe ends of a steel bar are not fastened together Before use, please consider the load and tensile strength of the useMaterial: SteelSteel diameter: 3mm
