Cool-See Replacement For Acer Aspire V5-531 V5-531P V5-551 V5-551G V5-571 V5-571G V5-571P V5-571PG M5-581G M5-581T M5-581TG Ultrabook MP-11F5 MP-11F53U4-528 MP-11F53U4-4424W PK130O22A00 The keyboard is 13.66 inch length,Please check the pic! (Up arrow around has two white Special design) Color: Black. Layout: US Layout The keyboard is without frame,so installation does require some modification of the frame it attaches to.installation was a little difficult. but the end result was no different than original Each keyboard is tested before shipping,Got another replacement if any issue after communication for free The models listed are compatible with each other.Perhaps one key different sign.