Pneumatic connectors are commonly used with 3D printers to connect Bowden tubes to extruders and hot ends, providing a reliable, strong fitting with little to no movement of the tube once fitted. This is a pack of five PC4-01 Black pneumatic connectors which accept Bowden tubes with a 4mm outer dimension (4mm OD) and 2mm inner dimension (2mm ID), such as the tubes we sell in the store. We sell a number of other styles of pneumatic connectors - take a look in our 3D printing section for more! Specifications * Type: PC4-01 Black * Thread OD: 9.7mm * Height: 18.9mm * Nut OD: 10 * Thread length: ~6.2mm * Input diameter (thread end): 6.8mm * Compatible PTFE: 4mm OD / 2mm ID * Weight (per connector): 5.5g Package Contents * 5x PC4-01 Black pneumatic connectors https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2023-03-07 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2023-12-27 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2024-09-18 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2024-11-29 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2024-11-30 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2025-11-28 https://elecena.pl/product/22727973/pc4-01-black-pneumatic-connectors-5-pack 2025-11-29