Product - Adjustable Disposable Cartridge Tubes Brand - Ultra Tubes® Sterilized - Yes Grip size available - 30mm (1.18" inch) grip handle. Whats Included - 10pcs/box & includes 2 plungers: 8.5mm & 9.5mm. Single piece tubes do not include plungers. Advantages - These adjustable cartridge grip tubes are perfect to adjust your needle depth up to 4mm and also securely lock into place to prevent unwanted depth adjustment while tattooing. ULTRA-TGRIP- compatible with all basic rotary & coil machines with Vice Locks. ULTRA-TGRIP-TL- compatible with Twist Lock machines like: Cheyenne Thunder & Spirit, FK Irons Halo & Direct & Edge X, as well as some Stealth machines.