Bright Tangerine's donuts are made from hard anodised aluminium and silicon nitride composite and are used to exclude light from a matte box/filter set-up. The adaptors are made from Delrin polymer material.
The Bright Tangerine Misfit 143 mm Rubber Donut - 117 mm HJ21 with Metal Threaded Ring is a versatile product that would be the perfect fit for various applications where a donut shape offers added grip or protection, such as in construction or automotive industries.