iShoot Tripod Mount Ring Lens Collar Compatible with Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens (EF and F Mount), 
(Not Compatible with Sigma 100-400mm f/5-6.3 DG DN OS (E-mount and L-Mount)
Built-in Arca-Swiss Type Quick Release Plate for Tripod Ball Head Compatible with Tripod Head & Clamp of RRS / ARCA-SWISS Fit

Main features:

1. The lens collar is tailor-made and only Compatible with Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens (EF and F Mount), Not Compatible with Sigma 100-400mm f/5-6.3 DG DN OS (E-mount and L-Mount) and other lenses.

2. The tripod mount ring's inner diameter is about 84mm, width is about 23mm, with 3M film inside, preventing lens from scratches; net weight is about 160g.

3. The tripod collar bottom is added 70mm long Arca fit quick release plate feature, can be used with 39mm Arca-swiss fit tripod ball head, panoramic head and clamp directly; more practical than lens collar without QR-Plate.

4. The Lens support bottom reserved 1/4" and 3/8" screw holes and stainless-steel anti-slip screw for fixing lens to tripod directly.

5. This lens holder bottom is AS standard quick release plate, compatible with RRS / ARCA-SWISS / ISHOOT tripod head of Arca 39mm fit, suitable for iShoot IS-JZ50 / IS-JZ64 / IS-QJ58 / IS-QJ64-FD / IS-JZ60BK / IS-JZ70MFT / IS-JZ80BK clamp.

Compatible with:
Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens ( EF and F Mount)
(Not Compatible with Sigma 100-400mm f/5-6.3 DG DN OS Lens E-Mount and L-Mount)

Package Includes:
1 x iShoot Lens Collar Tripod Mount Ring IS-SM140 Compatible with Sigma 100-400mm f/5-6.3 DG OS HSM Contemporary Lens

Note: The other items in the photos not listed here are for illustrating only, not included.