Feature: 1. [Broad Compatibility] Compatible with M3 screw hole, nice gimbal stabilizer replacement for DJI OM5, OM4, OSMO Mobile 3, etc. 2. [Practical Photography Accessory] Help to keep balance when phone case, lens, or other accessory are added to the smartphone. 3. [3PCS One Set] 2 * 20g and 1 * 10g counterweight offers 5 weights for free option to achieve balance: 10g, 20g, 30g, 40g, and 50g. 4. [High-Quality Material] Made from premium stainless steel with high hardness, rust-proof and corrosion-resistant. 5. [Good-Looking and Generous Appearance] Has exquisite 45° knurling pattern, slip-proof and easy to grasp, convenient for installation. Specification: Features： [Broad Compatibility] Compatible with M3 screw hole, nice gimbal stabilizer replacement for DJI OM5, OM4, OSMO Mobile 3, etc. [Practical Photography Accessory] Help to keep balance when phone case, lens, or other accessory are added to the smartphone. [3PCS One Set] 2 * 20g and 1 * 10g counterweight offers 5 weights for free option to achieve balance: 10g, 20g, 30g, 40g, and 50g. [High-Quality Material] Made from premium stainless steel with high hardness, rust-proof and corrosion-resistant. [Good-Looking and Generous Appearance] Has exquisite 45° knurling pattern, slip-proof and easy to grasp, convenient for installation. Specifications： Color: Silver Material: Stainless steel Product Size: 1.4 * 1.4 * 1.3cm/ 0.55 * 0.55 * 0.5inch (10g) 2.3 * 1.4 * 1.4cm/ 0.9 * 0.55 * 0.55inch (20g) Product Weight: 10g/ 0.35oz (Single one) 20g/ 0.7oz (Single one) Note： The gimbal stabilizer, smartphone, and smartphone lens showed in the pictures are not included. Package List： 2 * 20g Counterweight 1 * 10g Counterweight Package List: 2 * 20g Counterweight 1 * 10g Counterweight