Aeroflow's vacuum cap assortment kit is made from high quality silicone for durability. Able to withstand high under bonnet/hood temperatures. The kit includes 4 x 1/8 (3mm) 4 x 3/16 (5mm) 4 x 1/4 (6mm) 2 x 5/16 (8mm) and 2 x 3/8 (10mm). Available in a Blue or Black finish.