Haida Rear ND Filter Kit
for Sigma 12-24mm f4 DG HSM Art Lens Canon EF Mount
& Sigma 14-24mm f2.8 DG HSM Art Lens Canon EF Mount 

Includes:
1x ND0.9 8x
1x ND1.2 16x
1x ND1.8 64x
1x ND3.0 1000x
1x Adapter ring
1x Screwdrive

Features:
Compatible with 
Sigma 12-24mm f/4 DG HSM Art Lens Canon EF Mount
Sigma 14-24mm f/2.8 DG HSM Art Lens Canon EF Mount
Sigma 14mm f/1.8 DG HSM Art Lens Canon EF Mount
Not suitable for other Mount.