Push Button for GSI Creos PS289 Mr. Procon Boy WA PlatinumPush Button for GSI Creos PS289 Mr. Procon Boy WA Platinum The Push Button (Trigger) for PS289 Mr. Procon Boy WA is a must have accessory for any serious artist or hobbyist. Designed specifically for GSI Creos (Gunze) Mr. Procon Boy Platinum models PS270 and PS289, this Push Button is a game changer when it comes to airbrushing. Crafted with utmost precision and care, this Push Button is made in Japan, a country known for its superior craftsmanship.