Feature: 1. IS-SM1560C metal lens tripod bracket ring with quick release plate is suitable for Sigma 150-600mm f5-6.3DG OS HSM C lens. 2. Using aviation aluminum, CNC precision processing, hollow out to reduce weight, grinding and polishing, anodic oxidation surface, with stainless steel screws. 3. Adopts the original standard, inner diameter about 80.5mm, width about 22.5mm, increase the function of quick mounting plate, plate length about 75mm, with 1/4 inch and 3/8 inch screw holes and stainless steel anti-slip screw. 4. Quick release plate uses AS standard, compatible for RSS/ARCA SWISS/KIRK/WIMBERLEY/MARKINS/SUNWAYFOTO/KANGRINPOCHE/BENRO/SIRUI/MARSACE/ISHOOT standard ballhead, apply for IS - JZ30 / IS - JZ50 / IS - JZ64 / IS - QJ58 / IS - QJ64 / IS - QJ64 - FD/IS - JZ60BK/IS - JZ70MFT/IS - JZ80BK, etc. 5. Professional manufacturing, stable characteristics and high reliability. Specification: Condition: 100% Brand New Item Type: Lens Tripod Ring Model: IS-SM1560C Material: Aluminium Alloy Color: As Pictures Shown Fitment: for Sigma 150-600mm f5-6.3DG OS HSM Contemporary Lens Weight: Approx. 245g Inner Diameter: Approx. 80.5mm/3.17inch Width: Approx. 22.5mm/0.89inch Quick Release Plate Length: Approx. 75mm/2.95inch . Package List: 1 x Lens Tripod Ring1 x Internal Hex Wrench