Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy

Do not buy this product. The plastic is weak and poorly molded. The lead threads are not well formed causing the threads to strip during installation. Our of four caps only two were able to thread onto the valve without completely destroying the thread causing the caps to be completely worthless. I give the parts one star on the review only because the program will not allow me to submit without completing the field.