Replacement springs for GREO armbars You can adjust the load by simply replacing it with the main unit. *The main unit is not included. [Guidelines for choosing] 20kg: For those who want to make it lighter/for form practice and high reps 30kg: For fine adjustment for those who feel heavy at 40kg 【Contents】 ・1 replacement spring (20kg or 30kg) ・Color: Black 【Suitable for】 ・GREO armbar body (30kg/40kg/50kg compatible model) ・Cannot be used on other models made by other companies [Installation procedure (simple)] Make sure the main unit is not under load Remove the existing spring (check the fixed position) Insert this product into the designated hole and secure it securely. 　*Only the front two are used for the three-hole type. Slowly check the movement and check for abnormal noises and rattles 【Notes】 ・This page is for the sale of replacement springs alone. ・Exchanges and returns after use other than initial defects are not possible ・Indoor storage (avoid high temperatures, high humidity, and direct sunlight)