This is a Megatech Pull Start Assembly for .15 .16 .21 size engines. FEATURES: Black plastic pull start assembly Fuel tubing used to protect the starter rope INCLUDES: One starter assembly Three mounting screws One spring REQUIRES: A Megatech .15 .16 or .21 engine to install pull start assembly on. SPECS: Length: 1½"" (38mm) Width: 5/8"" (18mm) Height: 1¼"" (33mm)