20 Series Parker No-Skive Fitting is a field attachable (reusable) style fitting which permits quick, easy field assembly without special tools. Assembly of No-Skive hose and fittings does not require removal of outer cover of hose. This eliminates premature hose failure caused by skiving too long or short. 20 Series Fittings has zinc dichromate plating and are used on Parker 201-261, 206, 221FR, 225, 235, 266, SS25UL Hoses - the Parker Engine_Airbrake_Marine_Gas Hoses.