Jumbo mini roller system, contains 12" x 3/4" diameter jumbo mini roller cover frame & a 4-1/2" x 3/8" white dove jumbo mini roller cover, frame fits all jumbo mini roller covers, for all paints & finishes on semi smooth surfaces, ergonomic comfort grip handle, universal thread end, great for small hard to reach areas & gives the smoothest rolling action to make the job go faster.