Stick grips from Grab-On Grips are American made. These are the same grips used by two light helicopter manufactures. Care must be taken when stretching these over the PTT as they can tear easily. Using lubricant or glue for installation is not recommended. Compressed air at about 90 PSI (typical shop air pressure) through an air nozzle is the preferred installation method. Place the grip on to the top of the control stick and use the air to inflate the grip and float it over the PTT. Use of a tongue depressor or something similar can help with installation. Two grips are included.