Tamron's unique construction allows you to take off and put back on the lenscap with a lenshood in the shooting position, and they are tight enough that they rarely fall off by accident like so many other supposed bargains will certainly do. Available in the typical sizes between 52mm and 82mm. If you put the function of something like a lenscap above other concerns then just try one-you won't regret it!
This plastic bayonet lens hood is the hood which is originally supplied by Tamron with the #A001 SP 70-200mm f/2.8 Di lens, and is offered here as a replacement for a lost or damaged hood.
This hood bayonets on to the plastic tabs specifically upon the SP 70-200mm f/2.8 Di lens, and won't work upon any other lens.