W1284 T1284 Nav light lens and gasket kit. The 68-4230020-50 red position light lens is the Whelen equivalent to the Grimes A1280-2 which meets AN3042-2 as well as the Aeroflash 111-0066. The T1283 / W1283 / 38-0230021-00 is the replacement gasket that is used with the lens. The 68-4230020-40 green position light lens is the Whelen equivalent to the Grimes A1280-3 which meets AN3042-3 as well as theAeroflash 111-0067. This kit saves you over $10.00 compared to purchasing both lenses and gaskets separately.