Best Fittings Standard Microbore Fill Lines are the same specification as the Hoses found on many charging kits already on the market today. Featuring a 2mm bore Kevlar braided, zinc plated steel end fittings on whip, 400 BAR pressure rating Hose. Fitted with a Strain Reliever Spring on the cylinder end of all hoses, except 05H3-MB01 100mm (4″) length, with 1/8″ BSP Female Ends.