Nerf Hopper Cap

Friction fit cap designed for 1/2" schedule 40 PVC hopper. Requires one #4-40 x 3/4" long screw for the hinge.

EDIT: Updated top piece for improved friction fit because I was having issues blowing out my lid after repeated use.

EDIT: V5.0 (lots internal tests... haha) is untested but accomodates a 13/16 ID 15/16 OD O-ring for improved seal

EDIT: 10/19/2018 the latest file seals using an O-Ring, the 7/16 ID 5/8" OD should work or 3/8" ID 9/16" OD works.