I found that carberautor pre- heat hose was a good fit for the lap cooler vents to plenum on my 70 velle... i bought it at O reillys $5.99 and it comes in 1 x3/4 inch inside diam.. It is 18" long but stretches out to nearly 2 ft,which is enough top do both coolers. It :thumbsup:comes in a small box.. but like i said it stretches out..its alluminum and cuts easy to fit... I did not paint mine.. but it doesnt show really anyways.. this product is made by Thermoid.. and the web site shows many other hoses also.. just thought i would share..Phil