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.Condition: 100% Brand NewItem Type: Lens Tripod RingModel: IS-SM1560CMaterial: Aluminium Alloy Color: As Pictures ShownFitment: for Sigma 150-600mm f5-6.3DG OS HSM Contemporary LensWeight: Approx. 245gInner Diameter: Approx. 80.5mm/3.17inchWidth: Approx. 22.5mm/0.89inchQuick Release Plate Length: Approx. 75mm/2.95inch Package List1 x Lens Tripod Ring1 x Internal Hex Wrench