Gauge sleeves are TIG welded for strength, powder coated for durability and include a patented stainless steel latch system. No tape or clamp modifications needed. Typical installation time is one hour from start to finish. Features. Product Type: Caliper Covers. Engraved Front and Rear-mgp. Color: Black Powder Coated Finish. Material: 6061-T6 Aerospace Aluminum. Silver Characters. Easy to Install. Set of 4. Dimensions - 13 x 6 x 4.5 cm. Item Weight - 3 lbs.