Recommended needle life chart Osmium (metal) tip...not over 20 hours Sapphire (sy.jewel)..not over 65 hours Diamond (genuine)....not over 800 hours Matrix / Runout: LP-35337-1A (Stamped, Dead wax on Side A [variant 1]) Matrix / Runout: LP-35338-1A (Stamped, Dead wax on Side B [variant 1]) Matrix / Runout: LP-35337-1A H1 (Stamped, Dead wax on Side A [variant 2]) Matrix / Runout: LP-35338-1A H1 (Stamped, Dead wax on Side B [variant 2]) Matrix / Runout: LP 35337 (Label Side A) Matrix / Runout: LP 35338 (Label Side A)