Enlarged heat sink provides better heat dissipation effect. The rear 4-port design fits the size of the chassis and is universal for and small chassis. The tail is flush-edge design, the probability of blocking the Image card fan is smaller. The four-layer circuit board, with an isolation layer in the middle, has stronger anti-interference ability. Adopt for Marvell 9215 main control, support 99% . Strong compatibility and stable performance colour: Random Color ('t accept the specified color.) Material:metal Size:12x6.5x5.6CM Different batches of products are slightly different, which will not affect the use Package Contents: 1 * Riser card 1 * 4u chassis baffle 1 * 2u small chassis baffle 4 * Sata Cable Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.