This pack of 4 turntable needles are designed for renewing your record player needle, compatible with most turntables of record players Equipped with a ruby ceramic tip with up to 450 hours long life, providing better audio performance No tools required, just install the new record player stylus on player to replace the old one Makes your music sound clearer and smoother; It is an ideal gift for your family and friends who love music Overall Dimension (LxWxH): 11/16' x 3/8' x 3/16' (1.8 x 1 x 0.5cm)