We offer the following replacement laptop keys for your Acer Aspire 5551-a

Escape key, F1 key, F2 key, F3 key, F4 key, F5 key, F6 key, F7 key, F8 key, F9 key, F10 key, F11 key, F12 key, Prnt Scrn key, Pause/Break key, Ins key, Del key, Home key, Page Up key, Page Dn key, End key, ~` (tilda) key, 1 key, 2 key, 3 key, 4 key, 5 key, 6 key, 7 key, 8 key, 9 key, 0 (zero) key, minus/underscore key, plus/equals key, Backspace key, Num Lock key, Forward Slash (number pad) key, Asterisk (number pad) key, Minus (number pad) key, Tab key, Q key, W key, E key, R key, T key, Y key, U key, I key, O key, P key, [{ key, ]} key, backslash/pipeline key, 7 (number pad) key, 8 (number pad) key, 9 (number pad) key, Caps Lock key, A key, S key, D key, F key, G key, H key, J key, K key, L key, ;: (colon/semicolon) key, apostrophe/quotations key, Enter (main keyboard) key, 4 (number pad) key, 5 (number pad) key, 6 (number pad) key, Left Shift key, Z key, X key, C key, V key, B key, N key, M key, , < (comma/less than) key, . > (period/greater than) key, / ? (forward slash/question mark) key, Right Shift key, 1 (number pad) key, 2 (number pad) key, 3 (number pad) key, Left Ctrl key, Fn key, Windows Logo (start menu) key, Left Alt key, Space Bar key, Right Alt key, Right Click (context) key, Right Ctrl key, Up Arrow key, Down Arrow key, Left Arrow key, Right Arrow key, Zero/Ins (number pad) key, Del/Period (number pad) key, Plus (number pad) key, Enter (number pad) key