Adaption of the original 13mm irrigation pegs from IK3Digital to 16mm pipes. I essentially redrew the shape and remodeled the curve at the top to be the same, just for 16mm as I did not want to just scale the whole thing up and waste filament. I also added a 6cm shorter version for grounds where the soil is not penetrable for 21cm. The print profile adds a little strength in infill and walls.