yellow pvc gas pipe transportation of household gas. good pvc synthesize material,inside is strength fibre;bright color,soft. yellow pvc gas pipeGood pvc synthesize material, inside is strength fibre;bright color,soft and flexible.Its widely used for transport gas in houshold kitchenSize is 8.8.5,9,9.5,different thickness is available. 5/16" 3/8"yellow flexible gas hose