PRODUCT DESCRIPTION: 1. Product size: Trumpet: 21*4*0. 85Large: 25.5*4*0. 852. Type: Universal3. Applicable models: Universal4. Product weight: large size: 200g small size " 170g5. Color: P4 bracket-gray (small) P4 felt bag-small, P4 bracket-silver (small) P4 felt bag-small, P4 bracket-gray (large) P4 felt bag-large, P4 bracket-silver (large) P4 felt bag-large, P4 bracket-pink (large) P4 felt bag-large, 6. Material: aluminum alloy7. Load-bearing: large size: 20kg small size 15kg feature of product: 1. Aluminum alloy material, more suitable for notebook2. The triangular support is stable and does not shake, improving your working state3. Ultra-thin folding, more convenient to carry4. Three colors are available, gray silver, more suitable for the value of the notebook5.8 Gear adjustment (large 8 gears, small 6 gears) 6. Hollow design, worry-free cooling7. The buckle is non-slip8. Fold the buckle to block all kinds of laptops with different edges9. Multi-size compatible A:P4 bracket-gray (small) P4 felt bag-smallB:P4 bracket-silver (small) P4 felt bag-smallC:P4 bracket-gray (large) P4 felt bag-largeD:P4 bracket-silver (large) P4 felt bag-largeE:P4 bracket-pink (large) P4 felt bag-large