The Kel-F hub is made from CTFE plastic. Needles are available from 31 to 10 gauge. This hub is recommended when connecting to a rigid male Luer like a Luer Tip (LT) syringe because the plastic is more pliable and creates the best seal. All needles are sold in six-packs and the standard needles are 51 mm long. For all custom needles, the length and point style will need to be specified prior to placing an order.