Solid glass fluted stem from a PYREX AP 1041 TRANSMITTING RADIO ANTENNA STRAIN GLASS INSULATOR 12 3/8". It has a visible inscription on both sides in the center: PYREX J BRAND on one side and 1041 on the other. The glass is in good condition without damage or chips, has a slightly straw tint in daylight, and the entire 40 cm long piece of high-quality glass weighs 0.9 kg. Available for purchase for $75 INCLUDING shipping, PayPal preferred, more photos upon request. Thank you for viewing.