MSI GAMING nVIDIA GeForce GTX AMD Radeon Graphics Card Bolster (MSI Bolster) All-around Protection: protecting the motherboard from being damaged by the weight of graphics card Gas Spring Design: vertical support between top and bottom of case, fit the cases from 390 mm (height) to 680 mm Anti-shock Rubber Base: absorb the pressure from gas spring and prevent the cases from being scratched by the Jack Solid Graphics Card Lifter: plastic holders featuring rubber pad to buffer vibration and protect the thermal cover Package Dimensions: 17 x 2 x 2