Flexitime Cartridge Refill Pk Heavy 50mL 2/Bx by Kulzer SKU 959-1249AA 123 $32.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Flexitime Heavy Tray Refill: 2 - 50 mL Cartridges and 6 MIXPAC Mixing Tips. A-Silicone VPS Precision Impression Material.