Described is a needle assembly system comprising a needle assembly including a needle and a needle support, and a cover including a distal portion adapted to house at least a distal end of the needle and a proximal portion adapted to house the needle support. The proximal portion includes a first portion and a second portion. The first portion has a first inner diameter substantially equal to an outer diameter of the needle support and the second portion has a second inner diameter greater than the diameter of the needle support.
