Instatherm connecting cords, codes -16 & -20 feature in-line fuse protection against surges and high voltage. Code -16 fits our earlier style baths, pre 2009, while code -20 features a twist-lok socket used in our current baths. Code -05 fits a wishbone connector commonly used on the lid of Instatherm heated desiccators. Code -10 is a pin jack cord used with our 7825 series UV lamps. All cords are 6 feet in length.