Free Express Shipping! Tilta Clamp-On Adapter for MB-T12 Matte Box (136mm) For Tilta 4 x 5.65" MB-T12 Matte Box, Fits Lens with 136mm Outer Lens Barrel, Thumbscrew-Tightened Design, Keyhole Slots Attach to Matte Box, Aluminum & Stainless Steel Design