The Meltric 31-6A226 spring loaded cap is made to be used with DSN100 series poly male inlets. Has a stainless steel frame with a poly lid. Can be locked in position with a padlock (not included) to keep it from being easily removed. Used with poly male inlets only. Measures 2.79" Depth x 4.50" Length x 3.15" Width. Note: Image is for reference, actual part may differ. Ground shipping only