Dear Mr. Pina,
An employee at your company notified me about a Picker position that you have open in your company which I am interested in filling. I have attached my resume to this letter per your request and for your convenience. My experience in this line of work will hold me in good stead to be a vital member of your company.
I have worked at this position for another company for close to four years and am only leaving because they are requiring employees to take a pay cut and I cannot afford this. My communication skills are above average and I can read a packing slip in order to pull the right items for shipping. I know that attention to detail is important and this is something that I offer as well.
It is important that the right items are pulled for the right order and I always double check to ensure that I am picking the right items so I do not have to go back and do it again. This means that I can get more work done much quicker because I rarely make mistakes. I would like the chance to speak to you in person in regards to this opening. I can be reached by calling (555)-555-5555.