aluminum 30mm Ring Double Mounts + guide-track(16#)

product size: 52(L)x 47(W)x 17(H)

Ring Diameter(mm): 30

bayonet: 17 mm

Material: aluminum alloy

Weight(g): 72/ 85 

Color: Black

bayonet: paper box / 90(L)X 55(W)X 20(H)