Check the listing for details. GelStrike Delta Blaster - Bubblegum. Color: Bubblegum, Condition: New. Listed at 59.95 USD. Gel Balls are water-based and biodegradable pellets that dissolve on impact.so have fun blasting away in full-auto without any cleanup! GelStrike Delta Blaster. Kid-Friendly, Parent-Approved Gel Rapid Blaster.