The tapered design of the TS Series tapered silicone caps and plugs lets them fit a range of port sizes or over a variety of different-sized bolts. The product’s thin walls give them flexibility and elasticity — they can stretch over a bolt three times its size and be pushed into a port half their size. Heat-resistant silicone construction makes these caps and plugs suitable for use as a masking device, as well for many high-temperature finishing processes. Caplugs, 2150 Elmwood Ave., Buffalo, NY 14207, (888) 227-5847, www.caplugs.com